php域名截取

function getDomainFromUrl($url) {
    $pattern = '/^(?:http[s]?:\/\/)?(?:[^@\/\n]+@)?(?:www\.)?([^:\/\n]+)/';
    preg_match($pattern, $url, $matches);
    return $matches[1] ?? null;
}

$url = 'https://www.example.com/path/to/page?query=string';
$domain = getDomainFromUrl($url);
echo $domain; // 输出: example.com

function getDomainFromUrl($url) {
    $parsedUrl = parse_url($url);
    if (isset($parsedUrl['host'])) {
        $domain = $parsedUrl['host'];
        // 移除www.前缀
        if (strpos($domain, 'www.') === 0) {
            $domain = substr($domain, 4);
        }
        return $domain;
    }
    return null;
}

$url = 'https://www.example.com/path/to/page?query=string';
$domain = getDomainFromUrl($url);
echo $domain; // 输出: example.com