Detailed explanation of using curl to simulate IP instances

For websites with restricted IP addresses and sources, normal collection methods will not work. This article will introduce a method to use PHP's curl class to simulate IPs and sources, and collect websites with restricted IPs and sources.

1. Set page restrictions for IP and source access

server.php

##

<?php 
$client_ip = getip();$referer = getreferer(); 
$allow_ip = &#39;192.168.1.100&#39;;$allow_referer = &#39;http://www.uxuew.cn&#39;; 
if($client_ip==$allow_ip && strpos($referer, $allow_referer)===0){  echo &#39;allow access&#39;;
}else{  echo &#39;deny access&#39;;
} 
 
// 获取访问者ipfunction getip(){  if(!empty($_SERVER[&#39;HTTP_CLIENT_IP&#39;])){$cip = $_SERVER[&#39;HTTP_CLIENT_IP&#39;];
  }elseif(!empty($_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;])){$cip = $_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;];
  }elseif(!empty($_SERVER[&#39;REMOTE_ADDR&#39;])){$cip = $_SERVER[&#39;REMOTE_ADDR&#39;];
  }else{$cip = &#39;&#39;;
  }  return $cip;
} 
// 获取访问者来源function getreferer(){  if(isset($_SERVER[&#39;HTTP_REFERER&#39;])){return $_SERVER[&#39;HTTP_REFERER&#39;];
  }  return &#39;&#39;;
} 
?>

2. Use curl for normal access

<?phpfunction 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$url = &#39;http://www.uxuew.cn/server.php&#39;;$response = doCurl($url); 
echo $response;?>

3. Use curl to simulate ip and source for access

Simulated source

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

Simulated ip

curl_setopt($ch, CURLOPT_HTTPHEADER, array('CLIENT-IP: simulated ip','X-FORWARDED-FOR: simulated ip'));

The complete code is as follows:

<?phpfunction doCurl($url, $data=array(), $header=array(), $referer=&#39;&#39;, $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$url = &#39;http://www.example.com/server.php&#39;;$data = array(); 
// 设置IP$header = array(  &#39;CLIENT-IP: 192.168.1.100&#39;,
  &#39;X-FORWARDED-FOR: 192.168.1.100&#39;); 
// 设置来源$referer = &#39;http://www.uxuew.cn/&#39;; 
$response = doCurl($url, $data, $header, $referer, 5); 
echo $response;?>

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