Need help using multi curl in php to upload files - php

Question

My current script to upload photos goes like this:
foreach($files as $file) {
$data = base64_encode(file_get_contents($file));
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
}
I can have up to 1000 files to upload to a remote server and it can take a long time for curl to process everything. The solution seems to be multi-curl, however there is a unique aspect:
what I need from multi-curl is to save the response into an array like $upload_results[] = array($file, 'response')
How do I do this?
Thanks!

Answer 1

Essentially, this can be done by creating the handles in an array with the file names as keys and then reading the results into another array with the same keys.
function uploadLotsOfFiles($files) {
$mh = curl_multi_init();
$handles = array();
$results = array();
foreach ($files as $file) {
$handles[$file] = curl_init();
curl_setopt($handles[$file], CURLOPT_RETURNTRANSFER, true);
//File reading code and other options from your question go here
curl_multi_add_handle($mh, $handles[$file]);
}
$running = 0;
do {
curl_multi_exec($mh, $running);
curl_multi_select($mh); //Prevent eating CPU
} while($running > 0);
foreach($handles as $file => $handle) {
$results[$file] = curl_multi_getcontent($handle);
curl_multi_remove_handle($mh, $handle);
}
return $results;
}
If you really need the result to be in the format you specified (which I don't recommend since it's less elegant than using the file as a key):
$results[] = array($file, curl_multi_getcontent($handle));
Can be used in place of $results[$file] = curl_multi_getcontent($handle);