php 来源域名

$domain = $_SERVER['HTTP_HOST'];
echo $domain;

$url = 'http://example.com';
$parts = parse_url($url);
$domain = $parts['host'];
echo $domain;

function get_domain_from_url($url) {
    $parsed_url = parse_url($url);
    if (isset($parsed_url['host'])) {
        return $parsed_url['host'];
    }
    return false;
}

$domain = get_domain_from_url('http://example.com');
echo $domain;