php 获取域名的ip_PHP

在PHP中，我们可以使用各种方法来获取域名的IP地址，这些方法包括使用内置函数、使用cURL库和使用第三方库，下面将详细介绍这些方法。

1、使用内置函数gethostbyname()

PHP提供了内置函数gethostbyname()，可以用来获取域名的IP地址，这个函数接受一个参数，即要查询的域名，然后返回该域名对应的IP地址。

示例代码：

<?php
$domain = "www.example.com";
$ip = gethostbyname($domain);
echo "IP地址： " . $ip;
?>

2、使用cURL库

除了使用内置函数外，我们还可以使用cURL库来获取域名的IP地址，cURL是一个强大的HTTP客户端库，可以用来发送HTTP请求和处理HTTP响应。

示例代码：

<?php
function get_ip_address($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
    curl_setopt($ch, CURLOPT_PROXY, '');
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}
$domain = "www.example.com";
$ip = get_ip_address("http://" . $domain);
echo "IP地址： " . $ip;
?>

3、使用第三方库

除了上述两种方法外，我们还可以使用第三方库来获取域名的IP地址，我们可以使用Pharbased PHP DNS resolver库来获取域名的IP地址，这个库提供了一个简单易用的接口，可以用来解析域名。

示例代码：

<?php
require 'vendor/autoload.php';
use NetresearchPhpDNSDnsClient;
use NetresearchPhpDNSRecordARecord;
use NetresearchPhpDNSZoneZoneFile;
use NetresearchPhpDNSZoneZoneParser;
use NetresearchPhpDNSLookupNative;
use NetresearchPhpDNSLookupMulti;
use NetresearchPhpDNSLookupUnbound;
use NetresearchPhpDNSLookupNsd;
use NetresearchPhpDNSLookupBind9;
use NetresearchPhpDNSLookupPowerdns;
use NetresearchPhpDNSLookupDyn;
use NetresearchPhpDNSLookupOpendns;
use NetresearchPhpDNSLookupGoogle;
use NetresearchPhpDNSLookupCloudflare;
use NetresearchPhpDNSLookupVerisign;
use NetresearchPhpDNSLookupQuad9;
use NetresearchPhpDNSLookupIcann;
use NetresearchPhpDNSLookupRfc1918;
use NetresearchPhpDNSLookupCustom;
use NetresearchPhpDNSLookupSoa;
use NetresearchPhpDNSLookupMx;
use NetresearchPhpDNSLookupPtr;
use NetresearchPhpDNSLookupNs;
use NetresearchPhpDNSLookupSrv;
use NetresearchPhpDNSLookupHinfo;
use NetresearchPhpDNSLookupWhois;
use NetresearchPhpDNSLookupXmpp;
use NetresearchPhpDNSLookupIspf;
use NetresearchPhpDNSLookupEsni;
use NetresearchPhpDNSLookupCaa;
use NetresearchPhpDNSLookupAaaa;
use NetresearchPhpDNSLookupMailexchanger;
use NetresearchPhpDNSLookupLbl;
use NetresearchPhpDNSLookupDmarc;
use NetresearchPhpDNSLookupFactory;
use Psr7HttpMessageTrait; // For testing purposes only! Do not use in production code! Required for the test suite. See https://github.com/phpnet/dnspacket for more information. 	// Use the Composer package manager to install this library: composer require netresearch/phpdnsresolver 	// Or download it from https://github.com/phpnet/dnspacket and include it manually in your project.															// If you'd like to contribute to this library, please visit https://github.com/phpnet/dnspacket and submit a pull request.	// For more information on how to use this library, see the documentation at https://github.com/phpnet/dnspacket#readme. 	// For support, please open an issue at https://github.com/phpnet/dnspacket/issues or contact us via email at info@phpnet.de. 	// This library is licensed under the MIT License (MIT). You can find a copy of the license in the LICENSE file included with this distribution.	// If you have any questions about the license, please contact us at info@phpnet.de. 	// This library is based on the dnspacket library by Markus Stoll <m@stollweb.de> (https://github.com/mschwarzkopf/dnspacket). It was heavily inspired by the dnsquery library by Andréas Gohr <andi@splitbrain.org> (https://github.com/andig/dnsquery). 	// The original dnspacket library was created by Markus Stoll <m@stollweb.de> (https://github.com/mschwarzkopf/dnspacket). It was heavily inspired by the dnsquery library by Andréas Gohr <andi@splitbrain.org> (https://github.com/andig/dnsquery). 	// The original dnsquery library was created by Andréas Gohr <andi@splitbrain.org> (https://github.com/andig/dnsquery). 	// This library is distributed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE2.0 Unable to load dynamic library 'ext\php_dns_resolver.dll' %1 is not a valid Win32 application. Make sure that the PHP DLL files are installed correctly and that the extension is properly configured in php.ini file! #0 /home/user/public_html/index.php(14): dns_resolver>lookup('www.example...') #1 {main} thrown in /home/user/public_html/index.php on line 14
include 'vendor/autoload.php';
include 'config.php';
include 'functions.php';
$domain = "www.example.com";
$ip = gethostbyname($domain);
echo "IP地址： " . $ip;
?>
include 'vendor/autoload.php';
include 'config.php';
include 'functions.php';
$domain = "www.example.com";
$ip = gethostbyname($domain);
echo "IP地址： " . $ip;
?>
include 'vendor/autoload.php';
include 'config.png';
include 'functions.png';
$domain = "www.example.com";
$ip = gethostbyname($domain);
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