function getKey($username)
{
//Get their chat key, or generate a new one if we need to
$query = pdo_prepare("SELECT `chatkey` FROM `users` WHERE `username` = :username");
$query->bind(":username", $username);
$chatkey = $query->execute()->fetchIdx(0);
if ($chatkey == "" || $chatkey == false) {
//No key found, make them a new one
$chatkey = strRand(32);
$query = pdo_prepare("UPDATE `users` SET `chatkey` = :key WHERE `username` = :username");
$query->bind(":key", $chatkey);
$query->bind(":username", $username);
$query->execute();
}
return $chatkey;
}
<?php
function strRand($length = 32, $characters = '0123456789abcdefghijklmnopqrstuvwxyxABCDEFGHIJKLMNOPQRSTUVWXYZ')
{
if (!is_int($length) || $length < 0) {
return false;
}
$characters_length = strlen($characters) - 1;
$string = '';
for ($i = $length; $i > 0; $i--) {
$string .= $characters[mt_rand(0, $characters_length)];
}
return $string;
}
print strRand(32);