php生成随机数或者字符串的代码_PHP教程

<br><span style="CURSOR: pointer" onclick="doCopy('code80048')"><u></u></span> 代码如下:<br>/** <br>* 产生随机字符串 <br>* <br>* 产生一个指定长度的随机字符串,并返回给用户 <br>* <br>* @access public <br>* @param int $len 产生字符串的位数 <br>* @return string <br>*/ <br>function randstr($len=6) { <br>$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ <br>abcdefghijklmnopqrstuvwxyz0123456789-@#~'; <br>// characters to build the password from <br>mt_srand((double)microtime()*1000000*getmypid()); <br>// seed the random number generater (must be done) <br>$password=''; <br>while(strlen($password)<$len) <br>$password.=substr($chars,(mt_rand()%strlen($chars)),1); <br>return $password; <br>}<br>
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<p align="left"><span id="url" itemprop="url">http://www.bkjia.com/PHPjc/319425.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/319425.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">$len表示长度,代码如下:</span></p><pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li> 代码如下:<pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li>/** * 产生随机字符串 * * 产生一个指定长度的随机字符串,并返回给用户 * * @access public * @param i...<p></p></li><li>                    </li></ol></pre></li></ol></pre>