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    curl_multi_init

    (PHP 5, PHP 7, PHP 8)

    curl_multi_init — Restituisce un nuovo handle multiplo cURL

    Descrizione

    curl_multi_init(): resource

    Permette l'elaborazione di handle multipli cURL in modo asincrono.

    Elenco dei parametri

    Questa funzione non contiene parametri.

    Valori restituiti

    Restituisce una risorsa dell'handle multiplo cURL in caso di successo, false in caso di fallimento.

    Esempi

    Example #1 Esempio di curl_multi_init()

    Questa esempio creerà due handle cURL, li aggiunge ad un handle multiplo, e dopo li eseguirà in modo asincrono.

    <?php
    // crea entrambe le risorse cURL
    $ch1 = curl_init();
    $ch2 = curl_init();

    // imposta l'URL e altre opzioni appropriate
    curl_setopt($ch1, CURLOPT_URL, "http://lxr.php.net/");
    curl_setopt($ch1, CURLOPT_HEADER, 0);
    curl_setopt($ch2, CURLOPT_URL, "http://www.php.net/");
    curl_setopt($ch2, CURLOPT_HEADER, 0);

    //crea l'handle multiplo cURL
    $mh = curl_multi_init();

    //aggiunge i due handle
    curl_multi_add_handle($mh,$ch1);
    curl_multi_add_handle($mh,$ch2);

    $active = null;
    //esegui gli handle
    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);
    }
    }

    //chiude gli handle
    curl_multi_remove_handle($mh, $ch1);
    curl_multi_remove_handle($mh, $ch2);
    curl_multi_close($mh);

    ?>

    Vedere anche:

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    User Contributed Notes 4 notes

    up
    49
    w_haigh at yahoo dot com
    9 years ago
    Here's an easier to follow example, From : http://arguments.callee.info/2010/02/21/multiple-curl-requests-with-php/

    // build the individual requests, but do not execute them
    $ch_1 = curl_init('http://webservice.one.com/');
    $ch_2 = curl_init('http://webservice.two.com/');
    curl_setopt($ch_1, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch_2, CURLOPT_RETURNTRANSFER, true);
     
    // build the multi-curl handle, adding both $ch
    $mh = curl_multi_init();
    curl_multi_add_handle($mh, $ch_1);
    curl_multi_add_handle($mh, $ch_2);
     
    // execute all queries simultaneously, and continue when all are complete
      $running = null;
      do {
        curl_multi_exec($mh, $running);
      } while ($running);

    //close the handles
    curl_multi_remove_handle($mh, $ch1);
    curl_multi_remove_handle($mh, $ch2);
    curl_multi_close($mh);
     
    // all of our requests are done, we can now access the results
    $response_1 = curl_multi_getcontent($ch_1);
    $response_2 = curl_multi_getcontent($ch_2);
    echo "$response_1 $response_2"; // output results
    up
    45
    xxavalanchexx at gmail dot com
    10 years ago
    According to https://bugs.php.net/bug.php?id=61141:

    On Windows setups using libcurl version 7.24 or later (which seems to correspond to PHP 5.3.10 or later), you may find that curl_multi_select() always returns -1, causing the example code in the documentation to timeout. This is, apparently, not strictly a bug: according to the libcurl documentation, you should add your own sleep if curl_multi_select returns -1.

    Therefore, in order to work correctly on Windows for PHP 5.3.10+, the second loop in the example code should look something like the following:

    <?php
    while ($active && $mrc == CURLM_OK) {
        if (    curl_multi_select($mh) == -1) {
                usleep(100);
        }
        do {
                $mrc = curl_multi_exec($mh, $active);
        } while (    $mrc == CURLM_CALL_MULTI_PERFORM);
    }
    ?>
    up
    4
    Adam Richardson
    7 years ago
    One of the URLs used in the first example on this page (lxr.php.net) now gives a proxy error.

    If you're using this first script example, replace with a different URL.
    up
    -14
    hushuilong at gmail dot com
    13 years ago
    Simulate multiple threads request:
    <?php
    function multiple_threads_request($nodes){
                $mh = curl_multi_init();
                $curl_array = array();
            foreach(    $nodes as $i => $url)
            {
                    $curl_array[$i] = curl_init($url);
                    curl_setopt($curl_array[$i], CURLOPT_RETURNTRANSFER, true);
                    curl_multi_add_handle($mh, $curl_array[$i]);
            }
                $running = NULL;
            do {
                    usleep(10000);
                    curl_multi_exec($mh,$running);
            } while(    $running > 0);
           
                $res = array();
            foreach(    $nodes as $i => $url)
            {
                    $res[$url] = curl_multi_getcontent($curl_array[$i]);
            }
           
            foreach(    $nodes as $i => $url){
                    curl_multi_remove_handle($mh, $curl_array[$i]);
            }
                curl_multi_close($mh);       
            return     $res;
    }
    print_r(muti_thread_request(array(
            'http://www.example.com',
            'http://www.example.net',
    )));
    ?>
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