CakePHP 官方博客示例教程
初识CakePHP,感觉不错;
按照官方的博客示例教程练习了一下,有点自信继续学下去了。下面是示例:
地址:http://book.cakephp.org/2.0/en/tutorials-and-examples/blog/part-two.html
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Blog Tutorial - Adding a layer
Create a Post Model
The Model class is the bread and butter of CakePHP applications. By creating a CakePHP model that will interact with our database, we’ll have the foundation in place needed to do our view, add, edit, and delete operations later.
CakePHP’s model class files go in?/app/Model, and the file we’ll be creating will be saved to?/app/Model/Post.php. The completed file should look like this:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">class</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nc">Post</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">extends</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">AppModel</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span></span>
Naming convention is very important in CakePHP. By naming our model Post, CakePHP can automatically infer that this model will be used in the PostsController, and will be tied to a database table called?posts.
CakePHP will dynamically create a model object for you if it cannot find a corresponding file in /app/Model. This also means that if you accidentally name your file wrong (i.e. post.php or posts.php), CakePHP will not recognize any of your settings and will use the defaults instead.
For more on models, such as table prefixes, callbacks, and validation, check out the?Models?chapter of the Manual.
Create a Posts Controller
Next, we’ll create a controller for our posts. The controller is where all the business logic for post interaction will happen. In a nutshell, it’s the place where you play with the models and get post-related work done. We’ll place this new controller in a file called?PostsController.php?inside the?/app/Controller?directory. Here’s what the basic controller should look like:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">class</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nc">PostsController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">extends</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">AppController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$helpers</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Html'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Form'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span></span>
Now, lets add an action to our controller. Actions often represent a single function or interface in an application. For example, when users request www.example.com/posts/index (which is also the same as www.example.com/posts/), they might expect to see a listing of posts. The code for that action would look something like this:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">class</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nc">PostsController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">extends</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">AppController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$helpers</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Html'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Form'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">index</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">()</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">set</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'posts'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">find</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'all'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">));</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span></span>
Let me explain the action a bit. By defining function?index()?in our PostsController, users can now access the logic there by requesting www.example.com/posts/index. Similarly, if we were to define a function called?foobar(), users would be able to access that at www.example.com/posts/foobar.
Warning
You may be tempted to name your controllers and actions a certain way to obtain a certain URL. Resist that temptation. Follow CakePHP conventions (plural controller names, etc.) and create readable, understandable action names. You can map URLs to your code using “routes” covered later on.
The single instruction in the action uses?set()?to pass data from the controller to the view (which we’ll create next). The line sets the view variable called ‘posts’ equal to the return value of the?find('all')?method of the Post model. Our Post model is automatically available at?$this->Post?because we’ve followed Cake’s naming conventions.
To learn more about Cake’s controllers, check out the?Controllers?chapter.
Creating Post Views
Now that we have our data flowing to our model, and our application logic and flow defined by our controller, let’s create a view for the index action we created above.
Cake views are just presentation-flavored fragments that fit inside an application’s layout. For most applications they’re HTML mixed with PHP, but they may end up as XML, CSV, or even binary data.
Layouts are presentation code that is wrapped around a view, and can be defined and switched between, but for now, let’s just use the default.
Remember in the last section how we assigned the ‘posts’ variable to the view using the?set()?method? That would hand down data to the view that would look something like this:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x">// print_r($posts) output:</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x">Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [0] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [Post] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [id] => 1</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [title] => The title</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [body] => This is the post body.</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [created] => 2008-02-13 18:34:55</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [modified] =></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [1] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [Post] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [id] => 2</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [title] => A title once again</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [body] => And the post body follows.</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [created] => 2008-02-13 18:34:56</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [modified] =></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [2] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [Post] => Array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> (</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [id] => 3</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [title] => Title strikes back</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [body] => This is really exciting! Not.</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [created] => 2008-02-13 18:34:57</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> [modified] =></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> )</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x">)</span>
Cake’s view files are stored in?/app/View?inside a folder named after the controller they correspond to (we’ll have to create a folder named ‘Posts’ in this case). To format this post data in a nice table, our view code might look something like this:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><!-- File: /app/View/Posts/index.ctp --></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><h1 id="Blog-posts">Blog posts</h1></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><table>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> <tr>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><th>Id</th>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><th>Title</th>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><th>Created</th>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span>
</tr></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> <!-- Here is where we loop through our $posts array, printing out post info --></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">foreach</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$posts</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">as</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">)</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">:</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> <tr>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><td><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'id'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">];</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span></span></td>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><td>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Html</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">link</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'title'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">],</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'controller'</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=></span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'posts'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'action'</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=></span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'view'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'id'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">]));</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span></span>
</td>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><td><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'created'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">];</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span></span></td>
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span>
</tr></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">endforeach</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">;</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"> </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #007020;" class="nb">unset</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span></span></span></span>
</table></span>
Hopefully this should look somewhat simple.
You might have noticed the use of an object called?$this->Html. This is an instance of the CakePHP?HtmlHelperclass. CakePHP comes with a set of view helpers that make things like linking, form output, JavaScript and Ajax a snap. You can learn more about how to use them in?Helpers, but what’s important to note here is that the?link()method will generate an HTML link with the given title (the first parameter) and URL (the second parameter).
When specifying URLs in Cake, it is recommended that you use the array format. This is explained in more detail in the section on Routes. Using the array format for URLs allows you to take advantage of CakePHP’s reverse routing capabilities. You can also specify URLs relative to the base of the application in the form of /controller/action/param1/param2.
At this point, you should be able to point your browser to?http://www.example.com/posts/index. You should see your view, correctly formatted with the title and table listing of the posts.
If you happened to have clicked on one of the links we created in this view (that link a post’s title to a URL /posts/view/some_id), you were probably informed by CakePHP that the action hasn’t yet been defined. If you were not so informed, either something has gone wrong, or you actually did define it already, in which case you are very sneaky. Otherwise, we’ll create it in the PostsController now:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">class</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nc">PostsController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">extends</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">AppController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$helpers</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Html'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Form'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">index</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">()</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">set</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'posts'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">find</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'all'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">));</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">view</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$id</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">null</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">)</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">id</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$id</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">;</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">set</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">read</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">());</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span></span>
The?set()?call should look familiar. Notice we’re using?read()?rather than?find('all')?because we only really want a single post’s information.
Notice that our view action takes a parameter: the ID of the post we’d like to see. This parameter is handed to the action through the requested URL. If a user requests /posts/view/3, then the value ‘3’ is passed as?$id.
Now let’s create the view for our new ‘view’ action and place it in?/app/View/Posts/view.ctp:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><!-- File: /app/View/Posts/view.ctp --></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><h1></h1></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">h</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'title'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">]);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><p><small>Created: </small></p></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'created'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">];</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"><p></p></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">echo</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">h</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">[</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">][</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'body'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">]);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp">?></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="x"></span></span></span></span>
Verify that this is working by trying the links at?/posts/index?or manually requesting a post by accessing/posts/view/1.
Adding Posts
Reading from the database and showing us the posts is a great start, but let’s allow for the adding of new posts.
First, start by creating an?add()?action in the PostsController:
<span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #666666;" class="cp"><?php </span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">class</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nc">PostsController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">extends</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #c44f24;" class="nx">AppController</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$helpers</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Html'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Form'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Session'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$components</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Session'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">index</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">()</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">set</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'posts'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">find</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'all'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">));</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">view</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$id</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">)</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">id</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$id</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">;</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">set</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">,</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">read</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">());</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">}</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">public</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">function</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #bf4f24;" class="nf">add</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">()</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">if</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">request</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">is</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'post'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">))</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">create</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">();</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">if</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Post</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">save</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">request</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">data</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">))</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">{</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">Session</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">setFlash</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'Your post has been saved.'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">);</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #234aa0;" class="nv">$this</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">-></span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #080808;" class="na">redirect</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #a71d5d; font-style: italic;" class="k">array</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">(</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'action'</span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #794938;" class="o">=></span> <span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #0b6125;" class="s1">'index'</span><span style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;" class="p">));</span> </span>

PHP -Typ -Eingabeaufforderungen zur Verbesserung der Codequalität und der Lesbarkeit. 1) Tipps zum Skalartyp: Da Php7.0 in den Funktionsparametern wie int, float usw. angegeben werden dürfen. 3) Eingabeaufforderung für Gewerkschaftstyp: Da Php8.0 in Funktionsparametern oder Rückgabetypen angegeben werden dürfen. 4) Nullierstyp Eingabeaufforderung: Ermöglicht die Einbeziehung von Nullwerten und Handlungsfunktionen, die Nullwerte zurückgeben können.

Verwenden Sie in PHP das Klonschlüsselwort, um eine Kopie des Objekts zu erstellen und das Klonierungsverhalten über die \ _ \ _ Clone Magic -Methode anzupassen. 1. Verwenden Sie das Klonschlüsselwort, um eine flache Kopie zu erstellen und die Eigenschaften des Objekts, nicht die Eigenschaften des Objekts zu klonen. 2. Die \ _ \ _ Klonmethode kann verschachtelte Objekte tief kopieren, um flache Kopierprobleme zu vermeiden. 3. achten Sie darauf, dass kreisförmige Referenzen und Leistungsprobleme beim Klonen vermieden werden, und optimieren Sie die Klonierungsvorgänge, um die Effizienz zu verbessern.

PHP eignet sich für Webentwicklungs- und Content -Management -Systeme, und Python eignet sich für Datenwissenschafts-, maschinelles Lernen- und Automatisierungsskripte. 1.PHP hat eine gute Leistung beim Erstellen von schnellen und skalierbaren Websites und Anwendungen und wird üblicherweise in CMS wie WordPress verwendet. 2. Python hat sich in den Bereichen Datenwissenschaft und maschinelles Lernen mit reichen Bibliotheken wie Numpy und TensorFlow übertrifft.

Zu den wichtigsten Spielern in HTTP-Cache-Headern gehören Cache-Control, ETAG und Last-modifiziert. 1.Cache-Control wird verwendet, um die Richtlinien zu kontrollieren. Beispiel: Cache-Control: max-ay = 3600, öffentlich. 2. ETAG überprüft Ressourcenänderungen durch eindeutige Identifikatoren, Beispiel: ETAG: "686897696A7C876B7E". 3. Last-modifiziert gibt die letzte Änderungszeit der Ressource an, Beispiel: Last-Modified: Mi, 21okt201507: 28: 00GMT.

In PHP sollten die Funktionen für Passwort_Hash und passwart_verify verwendet werden, um sicheres Passwort -Hashing zu implementieren, und MD5 oder SHA1 sollte nicht verwendet werden. 1) Passwort_hash generiert einen Hash, der Salzwerte enthält, um die Sicherheit zu verbessern. 2) Passwort_Verify prüfen Sie das Passwort und sicherstellen Sie die Sicherheit, indem Sie die Hash -Werte vergleichen. 3) MD5 und SHA1 sind anfällig und fehlen Salzwerte und sind nicht für die Sicherheit der modernen Passwort geeignet.

PHP ist eine serverseitige Skriptsprache, die für dynamische Webentwicklung und serverseitige Anwendungen verwendet wird. 1.PHP ist eine interpretierte Sprache, die keine Zusammenstellung erfordert und für die schnelle Entwicklung geeignet ist. 2. PHP -Code ist in HTML eingebettet, wodurch es einfach ist, Webseiten zu entwickeln. 3. PHP verarbeitet die serverseitige Logik, generiert die HTML-Ausgabe und unterstützt Benutzerinteraktion und Datenverarbeitung. 4. PHP kann mit der Datenbank interagieren, die Einreichung von Prozessformularen und serverseitige Aufgaben ausführen.

PHP hat das Netzwerk in den letzten Jahrzehnten geprägt und wird weiterhin eine wichtige Rolle bei der Webentwicklung spielen. 1) PHP stammt aus dem Jahr 1994 und ist aufgrund seiner Benutzerfreundlichkeit und der nahtlosen Integration in MySQL die erste Wahl für Entwickler. 2) Zu den Kernfunktionen gehört das Generieren dynamischer Inhalte und die Integration in die Datenbank, sodass die Website in Echtzeit aktualisiert und auf personalisierte Weise angezeigt wird. 3) Die breite Anwendung und das Ökosystem von PHP hat seine langfristigen Auswirkungen angetrieben, steht jedoch auch mit Versionsaktualisierungen und Sicherheitsherausforderungen gegenüber. 4) Leistungsverbesserungen in den letzten Jahren, wie die Veröffentlichung von PHP7, ermöglichen es ihm, mit modernen Sprachen zu konkurrieren. 5) In Zukunft muss PHP sich mit neuen Herausforderungen wie Containerisierung und Microservices befassen, aber seine Flexibilität und die aktive Community machen es anpassungsfähig.

Zu den Kernvorteilen von PHP gehören einfacher Lernen, starke Unterstützung für Webentwicklung, reiche Bibliotheken und Rahmenbedingungen, hohe Leistung und Skalierbarkeit, plattformübergreifende Kompatibilität und Kosteneffizienz. 1) leicht zu erlernen und zu bedienen, geeignet für Anfänger; 2) gute Integration in Webserver und unterstützt mehrere Datenbanken. 3) leistungsstarke Frameworks wie Laravel; 4) hohe Leistung kann durch Optimierung erzielt werden; 5) mehrere Betriebssysteme unterstützen; 6) Open Source, um die Entwicklungskosten zu senken.


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