PHP Manual
cURL Functions
Run the sub-connections of the current cURL handle

curl_multi_exec

(PHP 5, PHP 7, PHP 8)

curl_multi_exec — Run the sub-connections of the current cURL handle

Description

curl_multi_exec(CurlMultiHandle $multi_handle, int &$still_running): int

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

multi_handle: A cURL multi handle returned by curl_multi_init().
still_running: A reference to a flag to tell whether the operations are still running.

Return Values

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.

Changelog

Version	Description
8.0.0	`multi_handle` expects a CurlMultiHandle instance now; previously, a resource was expected.

Examples

Example #1 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($ch1, CURLOPT_URL, "http://example.com/");
curl_setopt($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);

//execute the multi handle
do {
    $status = curl_multi_exec($mh, $active);
    if ($active) {
        // Wait a short time for more activity
        curl_multi_select($mh);
    }
} while ($active && $status == CURLM_OK);

//close the handles
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);

?>