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>

データベースストレージセッションを使用することの主な利点には、持続性、スケーラビリティ、セキュリティが含まれます。 1。永続性:サーバーが再起動しても、セッションデータは変更されないままになります。 2。スケーラビリティ:分散システムに適用され、セッションデータが複数のサーバー間で同期されるようにします。 3。セキュリティ:データベースは、機密情報を保護するための暗号化されたストレージを提供します。

PHPでのカスタムセッション処理の実装は、SessionHandlerInterfaceインターフェイスを実装することで実行できます。具体的な手順には、次のものが含まれます。1)CussentsessionHandlerなどのSessionHandlerInterfaceを実装するクラスの作成。 2)セッションデータのライフサイクルとストレージ方法を定義するためのインターフェイス(オープン、クローズ、読み取り、書き込み、破壊、GCなど)の書き換え方法。 3)PHPスクリプトでカスタムセッションプロセッサを登録し、セッションを開始します。これにより、データをMySQLやRedisなどのメディアに保存して、パフォーマンス、セキュリティ、スケーラビリティを改善できます。

SessionIDは、ユーザーセッションのステータスを追跡するためにWebアプリケーションで使用されるメカニズムです。 1.ユーザーとサーバー間の複数のインタラクション中にユーザーのID情報を維持するために使用されるランダムに生成された文字列です。 2。サーバーは、ユーザーの複数のリクエストでこれらの要求を識別および関連付けるのに役立つCookieまたはURLパラメーターを介してクライアントに生成および送信します。 3.生成は通常、ランダムアルゴリズムを使用して、一意性と予測不可能性を確保します。 4.実際の開発では、Redisなどのメモリ内データベースを使用してセッションデータを保存してパフォーマンスとセキュリティを改善できます。

APIなどのステートレス環境でのセッションの管理は、JWTまたはCookieを使用して達成できます。 1。JWTは、無国籍とスケーラビリティに適していますが、ビッグデータに関してはサイズが大きいです。 2.cookiesはより伝統的で実装が簡単ですが、セキュリティを確保するために慎重に構成する必要があります。

セッション関連のXSS攻撃からアプリケーションを保護するには、次の測定が必要です。1。セッションCookieを保護するためにHTTPonlyとセキュアフラグを設定します。 2。すべてのユーザー入力のエクスポートコード。 3.コンテンツセキュリティポリシー(CSP)を実装して、スクリプトソースを制限します。これらのポリシーを通じて、セッション関連のXSS攻撃を効果的に保護し、ユーザーデータを確保できます。

PHPセッションのパフォーマンスを最適化する方法は次のとおりです。1。遅延セッション開始、2。データベースを使用してセッションを保存します。これらの戦略は、高い並行性環境でのアプリケーションの効率を大幅に改善できます。

thesession.gc_maxlifettinginttinginphpdethinesthelifsessessiondata、setinseconds.1)it'sconfiguredinphp.iniorviaini_set()。 2)AbalanceSneededToAvoidPerformanceIssues andunexpectedLogouts.3)php'sgarbagecollectionisisprobabilistic、影響を受けたBygc_probabi

PHPでは、session_name()関数を使用してセッション名を構成できます。特定の手順は次のとおりです。1。session_name()関数を使用して、session_name( "my_session")などのセッション名を設定します。 2。セッション名を設定した後、session_start()を呼び出してセッションを開始します。セッション名の構成は、複数のアプリケーション間のセッションデータの競合を回避し、セキュリティを強化することができますが、セッション名の一意性、セキュリティ、長さ、設定タイミングに注意してください。


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