<?php
$ch = array();
$res = array();
$conn = array();
$urls = array(
  'baidu' => "http://www.baidu.com/",
  'cheyun' => "http://auto.jrj.com.cn/",
  'w3c' => "http://www.w3cschool.cc/",
);
// 創建批處理cURL句柄
$mh = curl_multi_init();
foreach ($urls as $i => $url) {
  // 創建一對cURL資源
  $conn[$i] = curl_init();
  // 設置URL和相應的選項
  curl_setopt($conn[$i], CURLOPT_URL, $url);
  curl_setopt($conn[$i], CURLOPT_HEADER, 0);
  curl_setopt($conn[$i], CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($conn[$i], CURLOPT_TIMEOUT, 10);
  //302跳轉
  curl_setopt($conn[$i], CURLOPT_FOLLOWLOCATION, 1);
  // 增加句柄
  curl_multi_add_handle($mh, $conn[$i]);
}
$active = null;
//防卡死寫法：執行批處理句柄
do {
  $mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
while ($active && $mrc == CURLM_OK) {
  if (curl_multi_select($mh) != -1) {
    do {
      $mrc = curl_multi_exec($mh, $active);
    } while ($mrc == CURLM_CALL_MULTI_PERFORM);
  }
}
foreach ($urls as $i => $url) {
  //獲取當前解析的cURL的相關傳輸信息
  $info = curl_multi_info_read($mh);
  //獲取請求頭信息
  $heards = curl_getinfo($conn[$i]);
  var_dump($heards);
  //獲取輸出的文本流
  $res[$i] = curl_multi_getcontent($conn[$i]);
  // 移除curl批處理句柄資源中的某個句柄資源
  curl_multi_remove_handle($mh, $conn[$i]);
  //關閉cURL會話
  curl_close($conn[$i]);
}
//關閉全部句柄
curl_multi_close($mh);
//var_dump($res);