php正则隐藏部分邮箱

<?php
function hideEmail($email) {
    // 使用正则表达式匹配邮箱地址
    $pattern = '/([\w\.\-]+)@([\w\-]+\.([\w\-]+\.)+[\w\-]+)/';
    // 替换匹配到的邮箱地址，隐藏部分用户名
    $replacement = '$1****@$2';
    return preg_replace($pattern, $replacement, $email);
}

$email = "example@example.com";
$hiddenEmail = hideEmail($email);
echo $hiddenEmail; // 输出: example****@example.com
?>

<?php
function isValidEmail($email) {
    $pattern = '/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/';
    return preg_match($pattern, $email);
}

$email = "example@example.com";
if (isValidEmail($email)) {
    $hiddenEmail = hideEmail($email);
    echo $hiddenEmail;
} else {
    echo "Invalid email address.";
}
?>