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:

curl_init() - Inizializza una sessione CURL
curl_multi_close() - Chiude un set di gestori cURL

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User Contributed Notes 3 notes

down

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

down

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);
}
?>

down

Adam Richardson ¶

6 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.

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