how to create image and header it in PHP?

I have one problem with PHP create image. What is wrong with my following code?

<?php
$filename = 'play';
$img = "http://ift.tt/1vR0fjU";


$image = imagecreatefromjpeg($img);
$cleft = 0;
$ctop = 45;
$canvas = imagecreatetruecolor(480, 270);
imagecopy($canvas, $image, 0, 0, $cleft, $ctop, 480, 360);
$image = $canvas;

$imageWidth = imagesx($image);
$imageHeight = imagesy($image);

// ADD THE PLAY ICON
$play_icon = "f-play.png";
$logoImage = imagecreatefrompng($play_icon);
imagealphablending($logoImage, TRUE);
$logoWidth = imagesx($logoImage);
$logoHeight = imagesy($logoImage);

// CENTER PLAY ICON
$left = round($imageWidth / 2) - round($logoWidth / 2);
$top = round($imageHeight / 2) - round($logoHeight / 2);

// CONVERT TO PNG SO WE CAN GET THAT PLAY BUTTON ON THERE
imagecopy( $image, $logoImage, $left, $top, 0, 0, $logoWidth, $logoHeight);
imagepng( $image, $filename .".png", 9);
// MASHUP FINAL IMAGE AS A JPEG
$input = imagecreatefrompng($filename .".png");
$output = imagecreatetruecolor($imageWidth, $imageHeight);
$white = imagecolorallocate($output, 255, 255, 255);
imagefilledrectangle($output, 0, 0, $imageWidth, $imageHeight, $white);
imagecopy($output, $input, 0, 0, 0, 0, $imageWidth, $imageHeight);

// OUTPUT TO 'i' FOLDER
header("Content-type: image/jpeg");
imagejpeg($output, $filename . ".jpg", 95);
// UNLINK PNG VERSION
@unlink($filename .".png");
die();
?>

Above code is create one image from giving url and add play icon to it. And I want to access to http://ift.tt/18f9Ndu it will show image with play icon.

Please help!