How to use curl to simulate ip and source for access through php-PHP Tutorial-php.cn

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

jacklove

Release： 2023-03-30 22:38:01

Original

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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;;
}?>

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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;?>

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Return deny access

3. Use curl to simulate ip and source for access

Simulation source

curl_setopt($ch, CURLOPT_REFERER, &#39;来源&#39;);

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Simulation ip

curl_setopt($ch, CURLOPT_HTTPHEADER, array(&#39;CLIENT-IP: 模拟ip&#39;,&#39;X-FORWARDED-FOR: 模拟ip&#39;));

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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;
?>

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Returnallow access

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