PHP Exec - How to only display the result of the last command

Question

I'm using exec php function to run a script that grabs a YouTube video in mp3 format (with youtube-dl).

At the end of this script I made an echo, this is the result I want.

But when I launch my php page, the output is composed of everything youtbe-dl did. Like that:

    [youtube] zTkS9SvhHUI: Downloading webpage
    [youtube] zTkS9SvhHUI: Downloading video info webpage
    [youtube] zTkS9SvhHUI: Extracting video information
    [youtube] zTkS9SvhHUI: Downloading js player en_US-vflgFv_Kx
    [youtube] zTkS9SvhHUI: Downloading js player en_US-vflgFv_Kx
    [download] Destination: /var/www/xxx/mp3dl/Kaskade - Whatever Ft KOLAJ (NEUS Remix).webm 
    [download] 0.0% of 3.84MiB at 10.17KiB/s ETA 06:26 
    [download] 0.1% of 3.84MiB at 30.44KiB/s ETA 02:09 
    [. . .] 
    [download] 100.0% of 3.84MiB at 4.01MiB/s ETA 00:00 
    [download] 100% of 3.84MiB in 00:00
    [ffmpeg] Destination: /var/www/xxx/mp3dl/Kaskade - Whatever Ft KOLAJ (NEUS Remix).mp3
    Deleting original file /var/www/xxx/mp3dl/Kaskade - Whatever Ft KOLAJ (NEUS Remix).webm (pass -k to keep)
    /var/www/xxx/mp3dl/Kaskade - Whatever Ft KOLAJ (NEUS Remix).mp3

The only thing I need is :

/var/www/xxx/mp3dl/Kaskade - Whatever Ft KOLAJ (NEUS Remix).mp3

How can I do that? Is there something I did not understand?

EDIT : There is my php code :

$url = htmlspecialchars($_POST['url']);
$choice1 = $_POST['choice1'];
$output = exec('sh scripts/ytdlmp3_direct.sh "'.$url.'"');
if(isset($_POST['action'])){
    if(empty($url)) {
        print("<div class='card-panel yellow'>Please add a URL</div>")  ;
    } else {
        if($choice1 == "download") {
            print $output;
        } elseif($choice1 == "store") {
            print "Soon";
        }
    }
}

Thanks! ~Quentin

Daniel · Accepted Answer · 2016-11-13 00:43:32Z

1

Add -q OR --quiet to your command via exec() and it will not output any of the "debug" messages.

From the documentation

-q, --quiet Activate quiet mode

answered Nov 13, 2016 at 0:43

Daniel

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