如何在PHP中组合从parallelcurl返回的json编码数组答案

【问题标题】：how to combine json encoded arrays returned from parallelcurl in PHP如何在PHP中组合从parallelcurl返回的json编码数组
【发布时间】：2012-06-12 17:35:16
【问题描述】：

我正在尝试实施我在此站点上找到的解决方案：

Parallel cURL execution in PHP

但是，我在合并所有结果并将其发送到 xmlhttprequest 进行处理时遇到了问题。最初 xmlhttprequest 将调用一个并行执行其他 php 脚本的 php 脚本。这是我的主要 php 脚本（由 xmlhttprequest 调用）：

//parallelcurl_index.php

$param1 = $_REQUEST['param1'];
$param2 = $_REQUEST['param2'];


require_once('parallelcurl.php');

$url1 = "http://example.com/script1.php?param1=" . $param1 . "&param2=" . $param2;
$url2 = "http://example.com/script2.php?param1=" . $param1 . "&param2=" . $param2;
$url3 = "http://example.com/script3.php?param1=" . $param1 . "&param2=" . $param2;
$url4 = "http://example.com/script4.php?param1=" . $param1 . "&param2=" . $param2;
$url5 = "http://example.com/script5.php?param1=" . $param1 . "&param2=" . $param2;
$url6 = "http://example.com/script6.php?param1=" . $param1 . "&param2=" . $param2;
/* 
 each of the above urls will execute one or more oracle sql queries and procedures and store the results in array which 
 will be sent to this script.
 example $url1 will send results like this:

$url1_response = array('city' => $city, 'country' => $country);
echo json_encode($url1_response); 

*/

$max_requests = 10;

$curl_options = array(
    CURLOPT_SSL_VERIFYPEER => FALSE,
    CURLOPT_SSL_VERIFYHOST => FALSE
);

$parallel_curl = new ParallelCurl($max_requests, $curl_options);

// Start 6 parallel requests. All three will be started simultaneously.
$parallel_curl->startRequest($url1, 'on_request_done');
$parallel_curl->startRequest($url2, 'on_request_done');
$parallel_curl->startRequest($url3, 'on_request_done');
$parallel_curl->startRequest($url4, 'on_request_done');
$parallel_curl->startRequest($url5, 'on_request_done');
$parallel_curl->startRequest($url6, 'on_request_done');

$parallel_curl->finishAllRequests();


// This function gets called back for each request that completes
function on_request_done($content, $url, $ch, $search) {
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($httpcode !== 200) {
        print "Fetch error $httpcode for '$url'\n";
        return;
    }

    $responseobject = json_decode($content, true);

     // I tried this, to combine the arrays but did not work:
     //$segments = array();
     //$segments = array_merge($responseobject, $segments);
     //echo json_encode($segments);


    // send results from all above scripts to xmlhttprequest 
    echo json_encode($responseobject); 

}

回到 xmlhttprequest ，我可以检查所有返回的数据：

alert(xmlHttp.responseText);

alert() 输出如下：

{"city":"Muscat","country":"Oman"}{"company":"OTL","Department":"IT"}

我可以看到每个 json 数组之间没有逗号分隔符，因此 eval() 将失败：

 var  responseArr = eval('(' + xmlHttp.responseText + ')');

如果我只在 $parallel_curl->startRequest() 中为一个 url 运行脚本并评论其他五个它可以正常工作。任何帮助将不胜感激。

【问题讨论】：

标签： php json xmlhttprequest

【解决方案1】：

嗯，我不是粉丝或并行 curl 请求（为什么要绑定网络服务器，像 GearMan 这样的东西更适合），但如果你走这条路：

class ReturnCollector {
   private $data = array();
   function addData($content){
      $this->data[] = json_decode($content, true);
   }
   function getData(){
      return $this->data);
   }
   function outputData(){
      echo json_encode($this->getData());
   }
}


$collector = new ReturnCollector();
$parallel_curl->startRequest($url1, array($collector,'addData'));
$parallel_curl->startRequest($url2, array($collector,'addData'));
$parallel_curl->startRequest($url3, array($collector,'addData'));
//etc...
$parallel_curl->finishAllRequests();
$collector->outputData();

【讨论】：

我认为实际上使该对象收集某些东西（而不仅仅是选择最后一个）缺少一些东西。请检查编辑。
啊，是的，这确实是我打算写的，谢谢@hakre。

【解决方案2】：

我已经修改了课程代码：

class ReturnCollector {
    private $data     = array();
    private $tmpArr   = array();
    function addData($content){
        $this->tmpArr   = json_decode($content, true);
        $this->data = array_merge($this->tmpArr, $this->data);
    }
    function getData(){
        return $this->data;
    }
    function outputData(){
        echo json_encode($this->getData());
    }
}

现在一切正常，非常感谢您的帮助。

【讨论】：