PHP curl_multi_exec运行一次

我使用php的curl_multi_exec创建多个xml请求时遇到问题。 问题是包含curl_multi_exec命令的do ... while循环只运行一次然后退出。 使用的资源: http://www.phpied.com/simultaneuos-http-requests-in-php-with-curl/ http://php.net/manual/en/function.curl-multi-exec.php/ http://www.rustyrazorblade.com/2008/02/curl_multi_exec/ 看看我的代码:
    //Multi handle curl initialization
    $mh = curl_multi_init();

    //set url
    $url = 'my_url';

    foreach($latLng as $id => $l) {
        $ch[$id] = curl_init();

        //$request previously set                

        //Initialize and set options 
        curl_setopt($ch, CURLOPT_URL,                $url);
        curl_setopt($ch, CURLOPT_HEADER,             0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,     1);
        curl_setopt($ch, CURLOPT_POST,               1);
        curl_setopt($ch, CURLOPT_POSTFIELDS,        $request); 

        //add to multi_handle
        curl_multi_add_handle($mh, $ch[$id]);
    }

    //Execute the handles
    $running = null;

    do {
        $mrc = curl_multi_exec($mh, $running);   
        $ready=curl_multi_select($mh);
        echo "Ran oncen";
    } while ($mrc == CURLM_CALL_MULTI_PERFORM && $ready > 0);

    while ($active && $mrc == CURLM_OK) {
        if ($curl_multi_select($mh) != -1) {
            do {
                $mrc = curl_multi_exec($mh, $running);
                echo "Ran againn";
            } while ($mrc == CURLM_CALL_MULTI_PERFORM);
        }
    }

    foreach ($mh as $c) {
        // HTTP response code
        $code = curl_getinfo($c,  CURLINFO_HTTP_CODE);

        // cURL error number
        $curl_errno = curl_errno($c);

        // cURL error message   
        $curl_error = curl_error($c);

        // output if there was an error                                                            
        if ($curl_error) {
            echo("*** cURL error: ($curl_errno) $curl_errorn");
        }
    }

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

    print_r($result);

    //Close curl
    curl_multi_close($mh);
}
我知道请求是有效的,因为当我执行单个curl执行时,我收到了正确的返回数据。问题出在curl_multi_exec()上。 我收到的输出是“Ran once”,然后是curl_multi_getcontent()调用的空数组。见下文: 跑了一次 排列 (     [0] =>     [1] =>     [2] =>     [3] =>     [4] =>     [5] =>     [6] =>     [7] =>     [8] => ) 任何帮助是极大的赞赏。     
已邀请:
您没有正确设置
curl
选项: 目前,你在
$ch
上设置了你的数组选项,你需要在当前的curl处理程序上专门设置选项,这在你的循环中是
$ch[$id]
   //Initialize and set options 
   curl_setopt($ch[$id], CURLOPT_URL,                $url);
   curl_setopt($ch[$id], CURLOPT_HEADER,             0);
   curl_setopt($ch[$id], CURLOPT_RETURNTRANSFER,     1);
   curl_setopt($ch[$id], CURLOPT_POST,               1);
   curl_setopt($ch[$id], CURLOPT_POSTFIELDS,        $request); 
    
改变这个:
foreach ($mh as $c) {
    $code = curl_getinfo($c,  CURLINFO_HTTP_CODE);
至:
for($i=1;$i<=count($array);$i++){
    $code = curl_multi_getcontent($ch[$i]); 
假设$ array是多个$ url的数组。     

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