PHP 生成随机字符串
<无详细内容>
function random_string($length, $max=FALSE)
{
if (is_int($max) && $max > $length)
{
$length = mt_rand($length, $max);
}
$output = '';
for ($i=0; $i<$length; $i++)
{
$which = mt_rand(0,2);
if ($which === 0)
{
$output .= mt_rand(0,9);
}
elseif ($which === 1)
{
$output .= chr(mt_rand(65,90));
}
else
{
$output .= chr(mt_rand(97,122));
}
}
return $output;
}
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