Multiple text on an image

<?php  
$cmd = " input.jpg -font Arial ".
" -pointsize 50 -draw \" gravity north fill black text 0,-5 'Rubblewebs' \" ".
" -pointsize 25  ".
" -draw \" gravity north fill black text 2,47 'Website design' \" ".
" -draw \" gravity north fill white text 0,45 'Website design' \" ".
" -draw \" gravity north fill black text 2,77 'www.rubblewebs.co.uk' \" ".
" -draw \" gravity north fill white text 0,75 'www.rubblewebs.co.uk' \" ".
" -draw \" gravity north fill black text 2,107 'anthony@rubblewebs.co.uk' \" ".
" -draw \" gravity north fill white text 0,105 'anthony@rubblewebs.co.uk' \" "; 
exec("convert $cmd output.png ");
?>