PHP培训实战教程之PHP函数

本是古典何须时尚 2022-08-22 00:22 247阅读 0赞

<table style="border-collapse:collapse; border-spacing:0px; font-size:14px; word-wrap:break-word; empty-cells:show; table-layout:fixed; width:680px; color:rgb(68,68,68); font-family:微软雅黑,'microsoft yahei',Tahoma,Helvetica,SimSun,sans-serif; line-height:18px"> 
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   <td style="padding:0px; margin:0px; font-size:14px; word-wrap:break-word"> <span style="word-wrap:break-word; display:block; margin-bottom:-30px; font-size:12px; text-align:center; line-height:32px; color:rgb(153,153,153)">&nbsp;</span><br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">1. sys_getloadavg()</span><br style="word-wrap:break-word"> sys_getloadavt()可以获得系统负载情况。该函数返回一个包含三个元素的数组，每个元素分别代表系统再过去的1、5和15分钟内的平均负载。php培训学院<br style="word-wrap:break-word"> 与其让服务器因高负载宕掉，不如在系统负载很高时主动die掉一个脚本，sys_getloadavg()就是用来帮你实现这个功能的。 不过很遗憾，该函数在windows下无效。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">2. pack()</span><br style="word-wrap:break-word"> Pack()能将md5()返回的32位16进制字符串转换为16位的二进制字符串，可以节省存储空间。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">3. cal_days_in_month()</span><br style="word-wrap:break-word"> cal_days_in_month()能够返回指定月份共有多少天。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">4. _()</span><br style="word-wrap:break-word"> WordPress开发者经常能见到这个函数，还有_e()。这两个函数功能相同，与gettext()函数结合使用，能实现网站的多语言化。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">5. get_browser()</span><br style="word-wrap:break-word"> 在发送页面前先看看用户的浏览器都能做些什么是不是挺好？get_browser()能获得用户的浏览器类型，以及浏览器支持的功能，不过首先你需要一个php_browscap.ini文件，用来给函数做参考文件。<br style="word-wrap:break-word"> 要注意，该函数对浏览器功能的判断是基于该类浏览器的一般特性的。例如，如果用户关闭了浏览器对JavaScript的支持，函数无法得知这一点。但是在判断浏览器类型和OS平台方面，该函数还是很准确的。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">6. debug_print_backtrace()</span><br style="word-wrap:break-word"> 这是一个调试用的函数，能帮助你发现代码中的逻辑错误。要理解这个函数，还是直接看个例子吧：<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> 
    <div style="padding:10px 0px 5px 10px; margin:10px 0px; word-wrap:break-word; overflow:hidden; color:rgb(102,102,102); zoom:1; border:1px solid rgb(204,204,204)"> 
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      <ol style="padding-top:0px; padding-bottom:0px; list-style:none; vertical-align:top; word-wrap:break-word; padding-right:0px!important; padding-left:0px!important; margin:0px 0px 0px 10px!important"> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $a = 0;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; function iterate() { </li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; global $a;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; if( $a &lt; 10 )</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; recur();</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; echo $a . “, “;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; }</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; function recur() { </li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; global $a;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $a++;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; // how did I get here?</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; echo “\n\n\n”;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; debug_print_backtrace();</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; if( $a &lt; 10 )</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;iterate();</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; }</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; iterate();</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # OUTPUT:</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #0&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #1&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:25]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #0&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #1&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:21]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #2&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #3&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:25]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #0&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #1&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:21]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #2&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #3&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:21]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #4&nbsp;&nbsp;recur() called at [C:\htdocs\php_stuff\index.php:8]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #5&nbsp;&nbsp;iterate() called at [C:\htdocs\php_stuff\index.php:25]</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> </li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> </li> 
      </ol> 
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     <span style="word-wrap:break-word; margin-left:43px; font-size:12px; color:rgb(51,51,51)!important">复制代码</span> 
    </div> <br style="word-wrap:break-word"> <span style="word-wrap:break-word; font-weight:700">7. metaphone()</span><br style="word-wrap:break-word"> 这个函数返回单词的metaphone值，相同读音的单词具有相同的metaphone值，也就是说这个函数可以帮你判断两个单词的读音是否相同。不过对中文就无效了。。。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> 8. natsort()<br style="word-wrap:break-word"> Natsort()能将一个数组以自然排序法进行排列，直接看个例子吧：<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> 
    <div style="padding:10px 0px 5px 10px; margin:10px 0px; word-wrap:break-word; overflow:hidden; color:rgb(102,102,102); zoom:1; border:1px solid rgb(204,204,204)"> 
     <div style="padding:0px; margin:0px; word-wrap:break-word"> 
      <ol style="padding-top:0px; padding-bottom:0px; list-style:none; vertical-align:top; word-wrap:break-word; padding-right:0px!important; padding-left:0px!important; margin:0px 0px 0px 10px!important"> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $items = array(</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; “100 apples”, “5 apples”, “110 apples”, “55 apples”</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; );</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; // normal sorting:</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; sort($items);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; print_r($items);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # Outputs:</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # Array</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # (</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[0] =&gt; 100 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[1] =&gt; 110 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[2] =&gt; 5 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[3] =&gt; 55 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # )</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; natsort($items);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; print_r($items);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # Outputs:</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # Array</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # (</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[2] =&gt; 5 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[3] =&gt; 55 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[0] =&gt; 100 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; #&nbsp; &nbsp;&nbsp;&nbsp;[1] =&gt; 110 apples</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; # )</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> </li> 
      </ol> 
     </div> 
     <span style="word-wrap:break-word; margin-left:43px; font-size:12px; color:rgb(51,51,51)!important">复制代码</span> 
    </div> <br style="word-wrap:break-word"> 9. levenshtein()<br style="word-wrap:break-word"> Levenshtein()告诉你两个单词之间的“距离”。它告诉你如果想把一个单词变成另一个单词，需要插入、替换和删除多少字母。<br style="word-wrap:break-word"> 看个我们在PHP培训实践中的例子吧：<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> 
    <div style="padding:10px 0px 5px 10px; margin:10px 0px; word-wrap:break-word; overflow:hidden; color:rgb(102,102,102); zoom:1; border:1px solid rgb(204,204,204)"> 
     <div style="padding:0px; margin:0px; word-wrap:break-word"> 
      <ol style="padding-top:0px; padding-bottom:0px; list-style:none; vertical-align:top; word-wrap:break-word; padding-right:0px!important; padding-left:0px!important; margin:0px 0px 0px 10px!important"> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $dictionary = array(</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; “php”, “javascript”, “css”</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; );</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $word = “japhp”;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $best_match = $dictionary[0];</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $match_value = levenshtein($dictionary[0], $word);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; foreach($dictionary as $w) { </li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $value = levenshtein($word, $w);</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; if( $value &lt; $match_value ) { </li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $best_match = $w;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; $match_value = $value;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; }</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; }</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp;&nbsp;&nbsp;</li> 
       <li style="padding:0px 0px 0px 10px; margin:0px 0px 0px 2em; font-size:12px; list-style:decimal-leading-zero; vertical-align:top; word-wrap:break-word; font-family:Monaco,Consolas,'Lucida Console','Courier New',serif; line-height:1.8em"> &nbsp; &nbsp; echo “Did you mean the ‘$best_match’ category?”;</li> 
      </ol> 
     </div> 
     <span style="word-wrap:break-word; margin-left:43px; font-size:12px; color:rgb(51,51,51)!important">复制代码</span> 
    </div> <br style="word-wrap:break-word"> 10. glob()<br style="word-wrap:break-word"> glob()会让你觉得用opendir(), readdir()和closedir()来寻找文件非常蠢。<br style="word-wrap:break-word"> <br style="word-wrap:break-word"> 看了这些函数，你是不是感觉轻松多了？php培训学院始终认为你将会是最棒的，加油！</td> 
  </tr> 
 </tbody> 
</table>

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