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<?php $emailA = "john1@here.com"; $emailB = "john1@here#.com"; function validateEmail( $email ){ $regex = "/^[a-zA-Z0-9.]+@[a-zA-Z0-9.]+\.[a-zA-Z]{2,4}/"; $error = "\nOnly letters, numbers, dot and @ are allowed"; echo (preg_match($regex,$email))? "$email is valid\n" : "$error - $email is invalid\n"; return true; } function validationReady( $bool) { if ($bool == false) { echo "\nCannot access validation feature right now"; } return true; } $emails = [$emailA, $emailB]; for ($i=0, $max=count($emails); $i < $max; $i++){ if (!validationReady(validateEmail($emails[$i]))) { echo "Validation feature unavailable"; } }