php取得url域名

<?php
$url = 'https://www.example.com/path/to/resource?query=string#anchor';

// 使用parse_url()函数解析URL
$parsedUrl = parse_url($url);

// 获取域名
$domain = $parsedUrl['host'];

echo 'Domain: ' . $domain; // 输出: Domain: www.example.com
?>

<?php
$url = 'https://www.example.com:8080/path/to/resource';

$parsedUrl = parse_url($url);
$domain = $parsedUrl['host'];

// 移除端口号
$domain = preg_replace('/:\d+$/', '', $domain);

echo 'Domain: ' . $domain; // 输出: Domain: www.example.com
?>

<?php
$url = 'https://192.168.1.1/path/to/resource';

$parsedUrl = parse_url($url);
$host = $parsedUrl['host'];

// 判断是否为IP地址
if (filter_var($host, FILTER_VALIDATE_IP)) {
    echo 'IP Address: ' . $host;
} else {
    echo 'Domain: ' . $host;
}
?>