PHP experience sharing: commonly used tips_PHP tutorial

PHP is the abbreviation of the English hypertext preprocessing language Hypertext Preprocessor. PHP is an HTML embedded language. It is a scripting language embedded in HTML documents that is executed on the server side. The language style is similar to C language and is widely used. This article summarizes 8 tips commonly used in daily PHP development.

1. Name

<ol class="dp-c"><li class="alt"><span><span><input type=</span><span class="string">'checkbox'</span><span> name=</span><span class="string">'checkbox[]'</span><span> value=</span><span class="vars">$dwmyrow</span><span>[banzhu] /> </span></span></li></ol>

2. Use

when planning as sql When part of the instruction: If the field participating in the control is of numeric type, then

<ol class="dp-c">
<li class="alt"><span><span class="keyword">if</span><span>(! </span><span class="func">empty</span><span class="keyword">empty</span><span>(</span><span class="vars">$_POST</span><span>[</span><span class="string">'checkbox'</span><span>])) {  </span></span></li>
<li>
<span class="vars">$expr</span><span> = join(</span><span class="string">","</span><span>, </span><span class="vars">$_POST</span><span>[</span><span class="string">'checkbox'</span><span>]);  </span>
</li>
<li class="alt">
<span class="vars">$sql</span><span> = </span><span class="string">"select * from tbl_name where field in ($expr)"</span><span>;  </span>
</li>
<li><span>} </span></li>
</ol>

If the field participating in the control is of numeric type, then

<ol class="dp-c">
<li class="alt"><span><span class="keyword">if</span><span>(! </span><span class="func">empty</span><span class="keyword">empty</span><span>(</span><span class="vars">$_POST</span><span>[</span><span class="string">'checkbox'</span><span>])) {  </span></span></li>
<li>
<span class="vars">$expr</span><span> = </span><span class="string">"'"</span><span>.join(</span><span class="string">"','"</span><span>, </span><span class="vars">$_POST</span><span>['checkbox']).</span><span class="string">"."</span><span>;  </span>
</li>
<li class="alt">
<span class="vars">$sql</span><span> = </span><span class="string">"select * from tbl_name where field in ($expr)"</span><span>;  </span>
</li>
<li><span>}  </span></li>
</ol>

PHP determines whether the Form is submitted

<ol class="dp-c">
<li class="alt"><span><span class="vars">$action</span><span>=</span><span class="vars">$HTTP_POST_VARS</span><span>[</span><span class="string">"Button1"</span><span>];  </span></span></li>
<li>
<span class="keyword">if</span><span>(</span><span class="vars">$action</span><span>==</span><span class="string">"提交"</span><span>)  </span>
</li>
<li class="alt"><span>{  </span></li>
<li>
<span class="comment">//执行表单操作 </span><span> </span>
</li>
<li class="alt"><span>}  </span></li>
<li>
<span class="keyword">else</span><span> </span>
</li>
<li class="alt"><span>{  </span></li>
<li>
<span class="comment">//读取默认值 </span><span> </span>
</li>
<li class="alt"><span>}  </span></li>
</ol>

PHP gets the string length

<ol class="dp-c"><li class="alt"><span><span class="func">strlen</span><span>(</span><span class="vars">$myrow</span><span>[1]) </span></span></li></ol>

PHP Url redirection

<ol class="dp-c"><li class="alt"><span><span>Header(</span><span class="string">"Location: "</span><span>.</span><span class="vars">$_SERVER</span><span>[</span><span class="string">"HTTP_REFERER"</span><span>]);  </span></span></li></ol>

PHP superglobal object

<ol class="dp-c"><li class="alt"><span><span><?php  </span></span></li><li><span class="vars">$a</span><span> = 1;  </span></li><li class="alt"><span class="vars">$b</span><span> = 2;  </span></li><li><span class="keyword">function</span><span> Sum()  </span></li><li class="alt"><span>{  </span></li><li><span class="vars">$GLOBALS</span><span>[</span><span class="string">"b"</span><span>] = </span><span class="vars">$GLOBALS</span><span>[</span><span class="string">"a"</span><span>] + </span><span class="vars">$GLOBALS</span><span>[</span><span class="string">"b"</span><span>];  </span></li><li class="alt"><span>}  </span></li><li><span>Sum();  </span></li><li class="alt"><span class="func">echo</span><span> </span><span class="vars">$b</span><span>;  </span></li><li><span>?>  </span></span></li></ol>

PHP form value

If method="get", use $_GET["test"] instead of $test
If method="post", use $_POST ["test"] Replace $test

PHP to get the current IP

<ol class="dp-c">
<li class="alt"><span><span><?=</span><span class="vars">$HTTP_SERVER_VARS</span><span>[</span><span class="string">"REMOTE_ADDR"</span><span>]?>  </span></span></li>
<li><span>PHP 取得当前时间  </span></li>
<li class="alt"><span> </span></li>
<li><span><?php  </span></li><li class="alt"><span class="func">echo</span><span> </span><span class="func">date</span><span>(</span><span class="string">"Y-m-d G:i:s"</span><span>);  </span></li><li><span>?>  </span></li>
<li class="alt">
<span class="func">date</span><span>(</span><span class="string">"Y年m月d日"</span><span>)  </span>
</li>
<li>
<span class="func">Date</span><span> (</span><span class="string">"Y-n-j"</span><span>) </span>
</li>
</ol>

I hope this article will help , can help you.

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