cURL not send requests

I have just 2 references and need to parse their. One reference is in .txt file, second was added in code :

$file = file('links.txt');
$urls = []; 

array_push($urls, 'https://www.facebook.com');
array_push($urls, $file[0]);

The .txt File conteins only one row - https://www.facebook.com.

var_dump($urls);
echo "<br>";

array(2) { [0]=> string(24) "https://www.facebook.com" 1=> string(24) "https://www.facebook.com" }

Now I need to get content from these pages via curl. My Code :

$multi = curl_multi_init();
$handles = [];
foreach($urls as $url)
{
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_multi_add_handle($multi, $ch);
    $handles[$url] = $ch;
} 
do {  
    $mrc = curl_multi_exec($multi, $active);  
} while ($mrc == CURLM_CALL_MULTI_PERFORM);

while ($active && $mrc == CURLM_OK) 
{
    if (curl_multi_select($multi) == -1) 
    {
       usleep(1);
    }
    do
    {
        $mrc = curl_multi_exec($multi, $active);
    }while($mrc == CURLM_CALL_MULTI_PERFORM);
}

foreach($handles as $channel)
{
    $html = curl_multi_getcontent($channel);
    $strlen = strlen($html);
    echo "Content length :".$strlen."<br>";
    curl_multi_remove_handle($multi, $channel);
}

Finally, this code must output 2 same digits, but I have this :

<br>
Content Len :0
<br>
<br>

In browser :

Could someone to say - where is error ?