PHP正则匹配URL优化技巧

_^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$_

$pattern = '/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/';
$url = "https://www.example.com/path/to/page";
if (preg_match($pattern, $url)) {
    echo "URL格式正确";
}

_^(https?:\/\/(www\.)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?)$_

$text = "访问我们的网站 https://example.com 或 http://blog.example.org 获取更多信息。";
$pattern = '/(https?:\/\/(www\.)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?)/';
preg_match_all($pattern, $text, $matches);
print_r($matches[0]); // 输出所有匹配的URL

function isValidUrl($url) {
    // 先用正则初步判断结构
    $pattern = '/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/';
    if (!preg_match($pattern, $url)) {
        return false;
    }
    // 再用filter_var做标准验证
    return filter_var($url, FILTER_VALIDATE_URL) !== false;
}

// 测试
var_dump(isValidUrl("https://www.php.net")); // true
var_dump(isValidUrl("not-a-url"));           // false