curl_multi_exec

(PHP 5, PHP 7)

Run the sub-connections of the current cURL handle

int curl_multi_exec ( resource $mh, int &$still_running )

Processes each of the handles in the stack. This method can be called whether or not a handle needs to read or write data.

Parameters:

A cURL multi handle returned by curl_multi_init().

still_running

A reference to a flag to tell whether the operations are still running.

Returns:

A cURL code defined in the cURL Predefined Constants.

Note:

This only returns errors regarding the whole multi stack. There might still have occurred problems on individual transfers even when this function returns CURLM_OK.

Examples:

curl_multi_exec() example

This example will create two cURL handles, add them to a multi handle, and process them asynchronously.

<?php
// create both cURL resources
$ch1 = curl_init();
$ch2 = curl_init();
 
// set URL and other appropriate options
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);
 
//create the multiple cURL handle
$mh = curl_multi_init();
 
//add the two handles
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);
 
$active = null;
//execute the handles
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);
    }
}
 
//close the handles
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);
 
?>