Curl Multi Php Download How-To
This article will show you an example of how to download multiple files concurrently using the curl_multi commands in PHP 5.While php itself doesn’t support multi threading and concurrency, libcurl does and php allows us to download multiple filesat the same time from php.
// Files to download
$urls = array('http://static.scribd.com/docs/cdbwpohq0ayey.pdf',
'http://static.scribd.com/docs/8wyxlxfufftas.pdf',
'http://static.scribd.com/docs/9q29bbglnc2gk.pdf',);
// Path to save files in
$save_path = '/tmp';
$multi_handle = curl_multi_init();
$file_pointers = array();
$curl_handles = array();
// Add curl multi handles, one per file we don't already have
foreach ($urls as $key => $url) {
$file = $save_path.'/'.basename($url);
if(!is_file($file)){
$curl_handles[$key]=curl_init($url);
$file_pointers[$key]=fopen ($file, "w");
curl_setopt ($curl_handles[$key], CURLOPT_FILE, $file_pointers[$key]);
curl_setopt ($curl_handles[$key], CURLOPT_HEADER , 0);
curl_setopt ($curl_handles[$key], CURLOPT_CONNECTTIMEOUT, 60);
curl_multi_add_handle ($multi_handle,$curl_handles[$key]);
}
}
// Download the files
do {
curl_multi_exec($multi_handle,$running);
}
while($running > 0);
// Free up objects
foreach ($urls as $key => $url) {
curl_multi_remove_handle($multi_handle,$curl_handles[$key]);
curl_close($curl_handles[$key]);
fclose ($file_pointers[$key]);
}
curl_multi_close($multi_handle);