Running youtube-dl with php exec

I am trying to fetch video details as JSON using PHP exec()
I have youtube-dl installed on my CentOS server.
Running youtube-dl -J <VideoURL> via SSH/Terminal just works fine.
My test.php script returns empty page 🙁

echo exec("youtube-dl -J <VideoURL>");
//Installed via pip

//OR

echo exec("python /home/site/youtube-dl -J <VideoURL>");
//Downloaded as file named youtube-dl

JavaScript
​x
 
echo exec("youtube-dl -J <VideoURL>");//Installed via pip​//OR​echo exec("python /home/site/youtube-dl -J <VideoURL>");//Downloaded as file named youtube-dl​

exec is enabled if I test it like:

if(function_exists('exec')) {
    echo "exec is enabled";
}

JavaScript
 
if(function_exists('exec')) {    echo "exec is enabled";}​

IP of server is not blocked by YouTube as i am able to successfully run command via terminal

Answer

I was able to achieve what you are by doing the following in my test.php file

<?php

if(function_exists('shell_exec')) {
    header('Content-Type: application/json');
    echo shell_exec("youtube-dl -J https://www.youtube.com/watch?v=zGDzdps75ns");
}

?>

JavaScript
 
<?php​if(function_exists('shell_exec')) {    header('Content-Type: application/json');    echo shell_exec("youtube-dl -J https://www.youtube.com/watch?v=zGDzdps75ns");}​?>​

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Answer