PHP implements the method of using curl to simulate IP and source for access

This article mainly introduces the method of using curl to simulate IP and source access in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

For websites that have restricted IP addresses and sources, they cannot be accessed using normal access methods. This article will introduce a method to use PHP's curl class to simulate IP and source, and access websites with restricted IP and source.

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.jb51.net&#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ip
function 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 to access normally

<?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 = &#39;http://www.example.com/server.php&#39;;
$response = doCurl($url);

echo $response;
?>

Return

deny access

3. Use curl to simulate IP and source for access

Simulation source

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

Simulation ip

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

The complete code is as follows:

<?php
function 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.jb51.net/&#39;;

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

echo $response;
?>

Return

allow access

The above is the entire content of this article, I hope it will be useful for everyone’s learning help.

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