How to use curl to simulate ip and source for access through php

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.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$url = &#39;http://www.example.com/server.php&#39;;$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, '来源');

Simulation 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;
?>

Returnallow access

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