PHP随机获得字符代码

ggp php 2013-06-30 522 次浏览
<?php
//获取随机字符 此函数区分字符大小写 如果不区分大小写可加入函数strtolower
function genRandomString($len)
{
????$chars = array(
????????”a”, “b”, “c”, “d”, “e”, “f”, “g”, “h”, “i”, “j”, “k”,??
????????”l”, “m”, “n”, “o”, “p”, “q”, “r”, “s”, “t”, “u”, “v”,??
????????”w”, “x”, “y”, “z”, “A”, “B”, “C”, “D”, “E”, “F”, “G”,??
????????”H”, “I”, “J”, “K”, “L”, “M”, “N”, “O”, “P”, “Q”, “R”,??
????????”S”, “T”, “U”, “V”, “W”, “X”, “Y”, “Z”, “0”, “1”, “2”,??
????????”3″, “4”, “5”, “6”, “7”, “8”, “9”
????);
????$charsLen = count($chars) – 1;
????shuffle($chars);// 将数组打乱
????$output = “”;
????for ($i=0; $i<$len; $i++)
????{
????????$output .= $chars[mt_rand(0, $charsLen)]; //获得一个数组元素
????}??
????return $output;
}
$str = genRandomString(4);
echo $str;
?>
??

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