PHP使用curl模拟ip和来源进行访问

对于限制了ip和来源的网站，使用正常的访问方式是无法访问的。本文将介绍一种方法，使用php的curl类实现模拟ip和来源，访问那些限制了ip和来源的网站。
server.php

<?php
 
$client_ip = getip();
$referer = getreferer();
 
$allow_ip = '192.168.1.100';
$allow_referer = 'https://xxxx.cn';
 
if($client_ip==$allow_ip && strpos($referer, $allow_referer)===0){
    echo 'allow access';
}else{
    echo 'deny access';
}
 
 
// 获取访问者ip
function getip(){
    if(!empty($_SERVER['HTTP_CLIENT_IP'])){
        $cip = $_SERVER['HTTP_CLIENT_IP'];
    }elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
        $cip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    }elseif(!empty($_SERVER['REMOTE_ADDR'])){
        $cip = $_SERVER['REMOTE_ADDR'];
    }else{
        $cip = '';
    }
    return $cip;
}
 
// 获取访问者来源
function getreferer(){
    if(isset($_SERVER['HTTP_REFERER'])){
        return $_SERVER['HTTP_REFERER'];
    }
    return '';
}
 
?>

使用curl正常访问

<?php
function doCurl($url, $data=array(), $header=array(), $timeout=30){
 
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
 
    $response = curl_exec($ch);
 
    if($error=curl_error($ch)){
        die($error);
    }
 
    curl_close($ch);
 
    return $response;
 
}
 
// 调用
$url = 'https://xxxx.cn/x.php';
$response = doCurl($url);
echo $response;
?>

返回deny access
使用curl模拟ip和来源进行访问
1. 模拟来源
curl_setopt($ch, CURLOPT_REFERER, '来源');
2. 模拟ip
curl_setopt($ch, CURLOPT_HTTPHEADER, array('CLIENT-IP: 模拟ip','X-FORWARDED-FOR: 模拟ip'));
完整代码如下：

<?php
function doCurl($url, $data=array(), $header=array(), $referer='', $timeout=30){
 
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
 
    // 模拟来源
    curl_setopt($ch, CURLOPT_REFERER, $referer);
 
    $response = curl_exec($ch);
 
    if($error=curl_error($ch)){
        die($error);
    }
 
    curl_close($ch);
 
    return $response;
 
}
// 调用
$url = 'http://xxx.com/server.php';
$data = array();
// 设置IP
$header = array(
    'CLIENT-IP: 192.168.1.100',
    'X-FORWARDED-FOR: 192.168.1.100'
);
// 设置来源
$referer = 'http://xxxx.cn/';
$response = doCurl($url, $data, $header, $referer, 5);
echo $response;
?>