problem with mages

[corillo181]

can someoen plz explain to me how to use this code all i keep getting is black boxes..

i want to turn one or more picture in a directory to thumbnails for faster view, but nothing ever works..

plz and thank you HELP!!!

[code]

<?php

$filename = 'images/pic.jpg';



header('Content-type: image/jpeg');



list($width, $height) = getimagesize($filename);


$newWidth=120;


$newHeight=intval($height*$newWidth/$width);


$newImage=ImageCreateTrueColor($newWidth,$newHeight);


imagecopyresampled($newImage,$oldImage,0,0,0,0,$newWidth,$newHeight,$width,$height);


ImageJPEG($newImage,"TN"."jhon.jpg");
?>

[/code]