- rand: documentation ( source)
<?php
function quickRandom($length = 16) {
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$l = strlen($pool);
$str = '';
while ($length--) {
$str .= $pool[rand(0, $l)];
}
return $str;
}
echo strlen(quickRandom(311));