php curl如何設定ip

php curl設定ip的方法：先透過getip方法取得訪客ip；然後使用「getreferer」方法取得訪客來源；最後實作設定頁面限制ip和來源存取即可。

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php 使用curl模擬ip與來源進行存取

對於限制了ip和來源的網站，使用正常的存取方式是無法存取的。本文將介紹一種方法，使用php的curl類別實作模擬ip和來源，造訪那些限制了ip和來源的網站。

1.設定頁面限制ip與來源存取

server.php

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

2.使用curl正常存取

<?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 = 'http://www.example.com/server.php';
$response = doCurl($url);
echo $response;
?>

返回deny access

3.使用curl模擬ip和來源進行存取

模擬來源

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

模擬ip

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

完整程式碼如下：

<?php
function doCurl($url, $data=array(), $header=array(), $referer='', $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 = 'http://www.example.com/server.php';
$data = array();
// 设置IP
$header = array(
    'CLIENT-IP: 192.168.1.100',
    'X-FORWARDED-FOR: 192.168.1.100'
);
// 设置来源
$referer = 'http://www.csdn.net/';
$response = doCurl($url, $data, $header, $referer, 5);
echo $response;
?>

返回allow access

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