php - 使用 cURL 在 PHP 中同时发出 HTTP 请求

Question

我正在尝试获取一个相当大的域列表，使用 compete.com API 查询每个域的排名，如此处所示 -> https://www.compete.com/developer/documentation

我编写的脚本采用我填充的域数据库并启动 cURL 请求以竞争网站的排名。我很快意识到这非常慢，因为每个请求都是一次发送一个。我做了一些搜索并发现了这篇文章-> http://www.phpied.com/simultaneuos-http-requests-in-php-with-curl/其中解释了如何使用 cURL 在 PHP 中同时执行 HTTP 请求。

不幸的是，该脚本将采用 25,000 个域的数组并尝试一次处理所有域。我发现每批 1,000 个效果很好。

知道如何向 compete.com 发送 1,000 个查询然后等待完成并发送下一个 1,000 个直到数组为空吗？这就是我正在处理的内容到目前为止:

<?php

//includes
include('includes/mysql.php');
include('includes/config.php');

//get domains
$result = mysql_query("SELECT * FROM $tableName");
while($row = mysql_fetch_array($result)) {
    $competeRequests[] = "http://apps.compete.com/sites/" . $row['Domain'] . "/trended/rank/?apikey=xxx&start_date=201207&end_date=201208&jsonp=";
}

//first batch
$curlRequest = multiRequest($competeRequests);
$j = 0;
foreach ($curlRequest as $json){
    $j++;
    $json_output = json_decode($json, TRUE);
    $rank = $json_output[data][trends][rank][0][value];

    if($rank) {
        //Create mysql query
        $query = "Update $tableName SET Rank = '$rank' WHERE ID  = '$j'";

        //Execute the query
        mysql_query($query);
        echo $query . "<br/>";
    }
}


function multiRequest($data) {
  // array of curl handles
  $curly = array();
  // data to be returned
  $result = array();

  // multi handle
  $mh = curl_multi_init();

  // loop through $data and create curl handles
  // then add them to the multi-handle
  foreach ($data as $id => $d) {

    $curly[$id] = curl_init();

    $url = (is_array($d) && !empty($d['url'])) ? $d['url'] : $d;
    curl_setopt($curly[$id], CURLOPT_URL,            $url);
    curl_setopt($curly[$id], CURLOPT_HEADER,         0);
    curl_setopt($curly[$id], CURLOPT_RETURNTRANSFER, 1);

    // post?
    if (is_array($d)) {
      if (!empty($d['post'])) {
        curl_setopt($curly[$id], CURLOPT_POST,       1);
        curl_setopt($curly[$id], CURLOPT_POSTFIELDS, $d['post']);
      }
    }

    curl_multi_add_handle($mh, $curly[$id]);
  }

  // execute the handles
  $running = null;
  do {
    curl_multi_exec($mh, $running);
  } while($running > 0);

  // get content and remove handles
  foreach($curly as $id => $c) {
    $result[$id] = curl_multi_getcontent($c);
    curl_multi_remove_handle($mh, $c);
  }

  // all done
  curl_multi_close($mh);

  return $result;

}
?>

Answer 1

代替

//first batch
$curlRequest = multiRequest($competeRequests);

$j = 0;
foreach ($curlRequest as $json){

你可以这样做:

$curlRequest = array();

foreach (array_chunk($competeRequests, 1000) as $requests) {
    $results = multiRequest($requests);

    $curlRequest = array_merge($curlRequest, $results);
}

$j = 0;
foreach ($curlRequest as $json){
    $j++;
    // ...

这会将大数组分成 1,000 个 block ，并将这 1,000 个值传递给您的 multiRequest 函数，该函数使用 cURL 来执行这些请求。