How to set ip in php curl

php curl method to set IP: First obtain the visitor IP through the getip method; then use the "getreferer" method to obtain the visitor source; finally, set the page to restrict IP and source access.

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php uses curl to simulate ip and source to access

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 the page to restrict IP and source access

server.php

<?php
$client_ip = getip();
$referer = getreferer();
$allow_ip = &#39;192.168.1.100&#39;;
$allow_referer = &#39;http://www.csdn.net&#39;;
if($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 for normal access

<?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 to deny access

3. Use curl to simulate ip and source to access

Simulate source

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

Simulate ip

curl_setopt($ch, CURLOPT_HTTPHEADER, array('CLIENT-IP: 模拟ip','X-FORWARDED-FOR: 模拟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.csdn.net/&#39;;
$response = doCurl($url, $data, $header, $referer, 5);
echo $response;
?>

Return allow access

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