Home php教程 PHP源码 取得随机数

取得随机数

Jun 08, 2016 pm 05:33 PM
break str

<script>ec(2);</script>

作用:取得随机字符串

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为小写子木,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

返回:取得的字符串
class activeCodeObj
{
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 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
break;
case '5':
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
break;
case '6':
$str = 'abcdefghijklmnopqrstuvwxyz1234567890';
break;
default:
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890';
break;
}

$result = '';
$l = strlen($str);

for($i = 0;$i $num = rand(0, $l);
$result .= $str[$num];
}
return $result;
}
}
?>

使用说明:

1.将以上框内代码另存为random.php

2.在需要地页面引入random.php


3. 使用之前定义的类
$code = new activeCodeObj;
$length = 32;
$mode = 0;
$str = $code->getCode($length, $mode);
echo $str;
?>

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