PHP preg_match的簡單使用,驗證郵箱地址

<?php
    function match_email($email) {
        $pattern = "/\w+@(\w|\d)+\.\w{2,3}/i";
        preg_match($pattern, $email, $matches);
        return $matches;
    }
    
    $email1 = "[e-mail]";
    $email2 = "[e-mail]";
    $email3 = "[e-mail]";
    $email4 = "test%@q..q.com";
    var_dump(match_email($email1));
    var_dump(match_email($email2));
    var_dump(match_email($email3));
    var_dump(match_email($email4));
?>

輸出

array(2) { [0]=> string(11) "[e-mail]" [1]=> string(1) "q" } array(2) { [0]=> string(12) "[e-mail]" [1]=> string(1) "3" } array(2) { [0]=> string(13) "[e-mail]" [1]=> string(1) "3" } array(0) { }