PHP语言功能强大,灵活的运用这项计算机语言,可以帮助我们实现许多必要的功能。PHP随机数类的应用就是一个初学者必须要掌握的知识。#t#
PHP随机数类代码示例:
- < ?php
- class getRandstrClass{
- function getCode ($length = 32, $mode = 0) {
- switch ($mode) {
- case '1':
- $str = '1234567890';
- break;
- case '2':
- $str = 'abcdefghijklmnopqrstuvwxyz';
- break;
- case '3':
- $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
- break;
- case '4':
- $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZa
bcdefghijklmnopqrstuvwxyz';break; - case '5':
- $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
- break;
- case '6':
- $str = 'abcdefghijklmnopqrstuvwxyz1234567890';
- break;
- default:
- $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcde
fghijklmnopqrstuvwxyz1234567890'; - break;
- }
- $randString = '';
- $len = strlen($str)-1;
- for($i = 0;$i < $length;$i ++){
- $num = mt_rand(0, $len);
- $randString .= $str[$num];
- }
- return $randString ;
- }
- }
- /* 使用方法
- $code = new getRandstrClass();
- $length = 4;
- $mode = 0;
- $str = $code->getCode($length, $mode);
- echo $str;
- $code = NULL;
- */
- ?>
以上这段代码就是PHP随机数类的具体使用方法。