您现在的位置：程式碼之家 >> 編程語言 > >> 網頁程式設計 >> PHP 程式設計 >> PHP 綜合知識

PHP 代理 IP 有效性檢測：並發驗證、成功率統計、響應耗時分析完整實現

編輯：PHP 綜合知識

檢測需求

驗證代理 IP 是否可用（能否正常訪問目標站點）
統計成功率、平均耗時、錯誤分布
支持多次檢測取平均，過濾不穩定節點
偽造請求頭防反爬

核心檢測函數

function checkProxyIp($proxyIp, $times = 10, $targetUrl = 'https://www.baidu.com/') {
    $headers = [
        'Accept: application/json',
        'Accept-Encoding: gzip, deflate',
        'Accept-Language: en-US,en;q=0.8',
        'Content-Type: application/json',
        'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
    ];
    
    $result = [
        'proxy' => $proxyIp,
        'total' => $times,
        'success' => 0,
        'failed' => 0,
        'total_time' => 0,
        'avg_time' => 0,
        'details' => []
    ];
    
    for ($i = 0; $i < $times; $i++) {
        $start = microtime(true);
        
        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $targetUrl,
            CURLOPT_HTTPHEADER => $headers,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_ENCODING => 'gzip,deflate',
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_PROXYTYPE => CURLPROXY_HTTP,
            CURLOPT_PROXY => $proxyIp,
            CURLOPT_TIMEOUT => 10,
            CURLOPT_CONNECTTIMEOUT => 5,
            CURLOPT_COOKIEFILE => sys_get_temp_dir() . '/proxy_cookie.txt',
            CURLOPT_COOKIEJAR => sys_get_temp_dir() . '/proxy_cookie.txt',
        ]);
        
        // 隨機偽造 X-Forwarded-For 防封禁
        $fakeIp = sprintf('%d.%d.%d.%d', mt_rand(1,255), mt_rand(0,255), mt_rand(0,255), mt_rand(0,255));
        curl_setopt($ch, CURLOPT_HTTPHEADER, array_merge($headers, [
            "Client-Ip: $fakeIp",
            "X-Forwarded-For: $fakeIp"
        ]));
        
        $content = curl_exec($ch);
        $elapsed = microtime(true) - $start;
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        $success = ($httpCode === 200 && strpos($content, '百度一下') !== false);
        
        $result['details'][] = [
            'seq' => $i + 1,
            'success' => $success,
            'http_code' => $httpCode,
            'time' => round($elapsed, 4),
            'content_length' => strlen($content)
        ];
        
        if ($success) {
            $result['success']++;
            $result['total_time'] += $elapsed;
        } else {
            $result['failed']++;
        }
    }
    
    $result['success_rate'] = $times > 0 ? round($result['success'] / $times * 100, 2) : 0;
    $result['avg_time'] = $result['success'] > 0 ? round($result['total_time'] / $result['success'], 4) : 0;
    
    return $result;
}

// 使用示例
$proxy = '117.95.100.126:8998';
$report = checkProxyIp($proxy, 10);
print_r($report);

輸出報告示例

Array
(
    [proxy] => 117.95.100.126:8998
    [total] => 10
    [success] => 8
    [failed] => 2
    [total_time] => 3.2456
    [avg_time] => 0.4057
    [success_rate] => 80.00
    [details] => Array
        (
            [0] => Array([success]=>1 [http_code]=>200 [time]=>0.3821 ...)
            [1] => Array([success]=>1 [http_code]=>200 [time]=>0.4102 ...)
            [2] => Array([success]=>0 [http_code]=>0 [time]=>10.0000 ...)  // 超時
            ...
        )
)

批量檢測與並發優化

function checkProxiesConcurrent($proxies, $times = 5, $concurrency = 20) {
    $mh = curl_multi_init();
    $handles = [];
    $results = [];
    
    // 初始化所有 easy handles
    foreach ($proxies as $proxy) {
        for ($i = 0; $i < $times; $i++) {
            $ch = curl_init();
            curl_setopt_array($ch, [
                CURLOPT_URL => 'https://www.baidu.com/',
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_PROXY => $proxy,
                CURLOPT_TIMEOUT => 10,
                CURLOPT_NOSIGNAL => true, // 多線程必須
            ]);
            curl_multi_add_handle($mh, $ch);
            $handles[(int)$ch] = ['proxy' => $proxy, 'seq' => $i];
        }
    }
    
    // 並發執行
    $running = null;
    do {
        curl_multi_exec($mh, $running);
        curl_multi_select($mh, 0.1);
    } while ($running > 0);
    
    // 收集結果
    foreach ($handles as $ch => $meta) {
        $content = curl_multi_getcontent($ch);
        $info = curl_getinfo($ch);
        $success = ($info['http_code'] === 200 && strpos($content, '百度一下') !== false);
        
        $results[$meta['proxy']][] = [
            'success' => $success,
            'time' => $info['total_time'],
            'http_code' => $info['http_code']
        ];
        curl_multi_remove_handle($mh, $ch);
        curl_close($ch);
    }
    curl_multi_close($mh);
    
    // 聚合統計
    $summary = [];
    foreach ($results as $proxy => $details) {
        $succ = array_filter($details, fn($d) => $d['success']);
        $summary[$proxy] = [
            'total' => count($details),
            'success' => count($succ),
            'rate' => count($details) ? round(count($succ)/count($details)*100, 2) : 0,
            'avg_time' => count($succ) ? round(array_sum(array_column($succ, 'time'))/count($succ), 4) : 0
        ];
    }
    return $summary;
}