can you help me with one question

i am running a php script in a centos unix server,

i have this line of code:

$test = exec($Command0,$output,$results);

the value of $test comes out as: [0] => Archive: /var/www/webx/web/scripts/OSWallpaper-beta-1.5.zip

what does the message Archive mean in the output of the exec() command?