PHP随机生成一串字母和数字组合
<?php
class GetChar{
function getCode ($length = 32, $mode = 0){
switch ($mode) {
case '1':
$str = '1234567890';
break;
case '2':
$str = 'abcdefghijklmnopqrstuvwxyz';
break;
case '3':
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
default:
$str = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
}
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