仅使用实时代理的代理轮换

Question

如何让我的 PHP 代码遍历数组并删除不起作用的代理？

<?php

$proxies = array(
"187.120.243.27:42026",
"138.185.56.166:32070",
"200.195.186.205:30698",
"170.239.46.2:41823",
"189.85.84.186:80",
);

//foreach value of array do the instructions below

$ch = curl_init();
curl_setopt($ch, CURLOPT_PROXY, $proxies);
//this value should be one value at time of the array 'proxies'
curl_setopt($ch,CURLOPT_URL,'http://icanhazip.com/');
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_HTTPHEADER,array(
    "User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0",
    "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "Accept-Language: en-US,en;q=0.5",
    "DNT: 1",
    "Upgrade-Insecure-Requests: 1",
    "Connection: close"
));

$data = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    if ($httpcode > 1) {
        echo "$data";
//live proxy stays on the list

    }

    else {
        //unset current array(remove not working proxy)
    }
?>

我已经完成了基本代码，但是我是 PHP 新手，有人可以帮助我吗？ 想法是检查列表中的所有代理并删除不起作用的代理。

Answer 1

我们可以在foreach 循环中访问键值对。我们使用$key => $value 语法分别访问它们。现在，当代理失败时，我们只需要使用unset() 函数，使用$key 从$proxies 数组中删除该代理值：

// Initialize live_proxies array
$live_proxies = $proxies;

// In the foreach loop, we access key and its value
// value is $proxy
foreach ($live_proxies as $key => $proxy) {

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_PROXY, $proxy);
    //this value should be one value at time of the array 'proxies'

    curl_setopt($ch,CURLOPT_URL,'http://icanhazip.com/');
    curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch,CURLOPT_HTTPHEADER,array(
        "User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0",
        "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
        "Accept-Language: en-US,en;q=0.5",
        "DNT: 1",
        "Upgrade-Insecure-Requests: 1",
        "Connection: close"
    ));

    $data = curl_exec($ch);
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    if ($httpcode > 1) {
        echo "$data";
    }
    else {
        // use unset function to remove current proxy value
        // from the live_proxies array using the $key
        unset($live_proxies[$key]);
    }
}