php 使用curl模拟ip和来源进行访问的实现方法

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。

1.设置页面限制ip和来源访问

server.php

<?php

$client_ip = getip();
$referer = getreferer();

$allow_ip = '192.168.1.100';
$allow_referer = '//www.jb51.net';

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 '';
}

?>

2.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 = 'http://www.example.com/server.php';
$response = doCurl($url);

echo $response;
?>

返回 deny access

3.使用curl模拟ip和来源进行访问

模拟来源

curl_setopt($ch, CURLOPT_REFERER, '来源');

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://www.example.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 = '//www.jb51.net/';

$response = doCurl($url, $data, $header, $referer, 5);

echo $response;
?>

返回 allow access

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