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/**
* 生成随机验证码
* @param string $len 验证码长度
* @return string
**/
function GetRandStr($len)
{
$chars = array(
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9" , "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"
);
$charsLen = count($chars) - 1;
shuffle($chars);
$output = "";
for ($i=0; $i<$len; $i++)
{
$output .= $chars[mt_rand(0, $charsLen)];
}
return $output;
}
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原文地址:http://www.cnblogs.com/yhdsir/p/4648571.html