php form passing value into php shell_exec

Question

I am trying to create a simple page that downloads youtube videos with the help of youtube-dl app.

<form action="" method="post">
<input type="submit" name="youtubedl" value="dload YouTube">
<input type="text" name="addr" value="">
</form>

PHP part looks like this:

<?php
echo "<pre>";
$link = escapeshellarg($_GET["addr"]);
if(isset($_POST['youtubedl']))
 {
   $output=shell_exec("/usr/local/bin/youtube-dl $link");
   echo $link;
   echo $output;
 }
?>

I think my variable is not getting passed onto PHP as echo $link is not producing any output.

error.log returns ERROR: u'' is not a valid URL

Answer 1

You are looking for addr in $_GET while it will be in $_POST since you use method="post".