curl_multi_exec
(PHP 5)
curl_multi_exec — Run the sub-connections of the current cURL handle
Description
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
- mh
-
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.
Examples
Example #1 curl_multi_exec() example
This example will create two cURL handles, add them to a multi handle, and then run them in parallel.
<?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);
?>
See Also
- curl_multi_init() - Returns a new cURL multi handle
- curl_multi_select() - Wait for activity on any curl_multi connection
- curl_exec() - Perform a cURL session