PHP multi curl - return unknown value - php

Question

I want to user curl for login to other websites. I use curl multi threading for it.
code 1:
<?php
$ch1 = curl_init();
$ch2 = curl_init();
curl_setopt($ch1, CURLOPT_URL, $url);
curl_setopt($ch2, CURLOPT_URL, $url);
curl_setopt($ch1, CURLOPT_COOKIE, $post);
curl_setopt($ch2, CURLOPT_COOKIE, $post2)
$mh = curl_multi_init();
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);
$active = null;
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);
}
}
?>
code 2 :
<?php
$mh = curl_multi_init();
foreach($data as $key => $value)
{
$key = curl_init();
curl_setopt($key, CURLOPT_URL, $value["url"]);
curl_setopt($key, CURLOPT_COOKIE, $value[$key]);
curl_multi_add_handle($mh,$key);
}
$active = null;
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);
}
}
?>
Code 1 can return me result that i want but not very dynamic. Code 2 just return me ‹‹. Anyone can explain to me why like this?

Answer 1

Could you provide an example of $data you are using in the second example. The first loop there makes no sense for me:
foreach($data as $key => $value) //assuming $key here is a scalar
{
$key = curl_init(); // after this line $key is a resource or false
curl_setopt($key, CURLOPT_URL, $value["url"]);
curl_setopt($key, CURLOPT_COOKIE, $value[$key]); // likely $value[$key] is empty, and there is a notice in the log
curl_multi_add_handle($mh,$key);
}
Apart from that, you probably want to close handlers after the final loop, and output some results. I don't see at which point Code 2 just return anything.