PHP获取随机数经验之谈
作用:
取得随机字符串
PHP获取随机数的参数:
1、(int)$length = 32 #随机字符长度
2、(int)$mode = 0 #随机字符类型,0为大小写英文和数字,1为数字,2为小写字母,3为大写字母,4为大小写字母,5为大写字母和数字,6为小写字母和数字
PHP获取随机数定义类代码
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>class getRandstrClass </span></li> <li class="alt"><span>{ </span></li> <li> <span>function getCode ($</span><span class="attribute">length</span><span> = </span><span class="attribute-value">32</span><span>, $</span><span class="attribute">mode</span><span> = </span><span class="attribute-value">0</span><span>) </span> </li> <li class="alt"><span>{ </span></li> <li><span>switch ($mode) { </span></li> <li class="alt"><span>case '1': </span></li> <li> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'1234567890'</span><span>; </span> </li> <li class="alt"><span>break; </span></li> <li><span>case '2': </span></li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'abcdefghijklmnopqrstuvwxyz'</span><span>; </span> </li> <li><span>break; </span></li> <li class="alt"><span>case '3': </span></li> <li> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</span><span>; </span> </li> <li class="alt"><span>break; </span></li> <li><span>case '4': </span></li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZa<br>bcdefghijklmnopqrstuvwxyz'</span><span>;break; </span> </li> <li><span>case '5': </span></li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXY<br>Z1234567890'</span><span>; </span> </li> <li><span>break; </span></li> <li class="alt"><span>case '6': </span></li> <li> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'abcdefghijklmnopqrstuvwxyz<br>1234567890'</span><span>; </span> </li> <li class="alt"><span>break; </span></li> <li><span>default: </span></li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZa<br>bcdefghijklmnopqrstuvwxyz1234567890'</span><span>; </span> </li> <li><span>break; </span></li> <li class="alt"><span>} </span></li> <li> <span>$</span><span class="attribute">randString</span><span> = </span><span class="attribute-value">''</span><span>; </span> </li> <li class="alt"> <span>$</span><span class="attribute">len</span><span> = </span><span class="attribute-value">strlen</span><span>($str)-1; </span> </li> <li> <span>for($</span><span class="attribute">i</span><span> = </span><span class="attribute-value">0</span><span>;$i </span><span class="tag"><span> $length;$i ++){ </span></span> </li> <li class="alt"> <span>$</span><span class="attribute">num</span><span> = </span><span class="attribute-value">mt_rand</span><span>(0, $len); </span> </li> <li> <span>$randString </span><span class="attribute">.</span><span>= $str[$num]; </span> </li> <li class="alt"><span>} </span></li> <li><span>return $randString ; </span></li> <li class="alt"><span>} </span></li> <li><span>} </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> </ol>
PHP获取随机数使用说明:
1.将以上代码另存为random.php
2.在需要的页面引入random.php
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>require_once('random.php'); </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> </ol>
3. 使用之前定义的类
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li> <span>$</span><span class="attribute">code</span><span> = </span><span class="attribute-value">new</span><span> getRandstrClass(); </span> </li> <li class="alt"> <span>$</span><span class="attribute">length</span><span> = </span><span class="attribute-value">32</span><span>; </span> </li> <li> <span>$</span><span class="attribute">mode</span><span> = </span><span class="attribute-value">0</span><span>; </span> </li> <li class="alt"> <span>$</span><span class="attribute">str</span><span> = $code-</span><span class="tag">></span><span>getCode($length, $mode); </span> </li> <li><span>echo $str; </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> </ol>
以上就是PHP获取随机数的全部应用方法。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

Notepad++7.3.1
Easy-to-use and free code editor

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 Chinese version
Chinese version, very easy to use

Dreamweaver CS6
Visual web development tools
