How to change PHP’s eregi to preg_match [duplicate]
Perl-style regex patterns always need to be delimited. The very first character in the string is considered the delimiter, so something like this: function validate_email($email) { if (!preg_match(“/^[[:alnum:]][a-z0-9_.-]*@[a-z0-9.-]+\.[a-z]{2,4}$/i”, $email)) { echo ‘bad email’; } else { echo ‘good email’; } } The reason your initial attempt didn’t work is because it was trying to use … Read more