You're giving this error:
warning: preg_match (): No ending delimiter '^' found in /home/j17oloba/public_html/libs/lib.php on line 536
function lib_checkemail($email)
{
if(preg_match("^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\.[a-z]{2,3}$", $email, $check))
{