curl_multi_init

(PHP 5)

curl_multi_initReturns a new cURL multi handle

Description

resource curl_multi_init ( void )

Allows the processing of multiple cURL handles in parallel.

Parameters

This function has no parameters.

Return Values

Returns a cURL multi handle resource on success, FALSE on failure.

Examples

Example #1 curl_multi_init() 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($ch1CURLOPT_URL"http://www.example.com/");
curl_setopt($ch1CURLOPT_HEADER0);
curl_setopt($ch2CURLOPT_URL"http://www.php.net/");
curl_setopt($ch2CURLOPT_HEADER0);

//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);

$running=null;
//execute the handles
do {
    
usleep(10000);
    
curl_multi_exec($mh,$running);
} while (
$running 0);

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

?>

See Also

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User Contributed Notes 2 notes

up
-2
hushuilong at gmail dot com
2 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',
)));
?>
up
-8
jaisen at jmathai dot com
5 years ago
http://github.com/jmathai/epicode/tree/master/php/EpiCurl.php

If you fire off 10 curl requests in parallel you don't have to wait for all of them to be finished before accessing one which is already finished.
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