[711]

You are trying to use a literal operator on a string, which won't work here.

Try this:

$user_info = $db->query_read("SELECT * FROM " . TABLE_PREFIX . "user WHERE email LIKE " . $delemail . "%");

this will match the email address user@whatever.com with a wildcard right after it (along the lines of user@whatever.com* ). The wildcard can be any characters, or no characters. Since all of your email addresses are unique and none of them should have any characters after the TLD, this should work.