Изображение отображается как текст - Joomla 3.x: Общие вопросы

<?php
	$path_to_skin = 'outpost.png';
	
	if ( !file_exists($path_to_skin) ) {
		$path_to_skin = 'default.png';
	}

	$skin = imagecreatefrompng($path_to_skin);
	
	$skin_size = getimagesize($path_to_skin);
	$h = $skin_size[0];
	$w = $skin_size[1];
	$ratio = $h / 64;
	
	$preview = imagecreatetruecolor(16 * $ratio, 32 * $ratio);
	$alpha = imagecolorallocatealpha($preview, 255, 255, 255, 127);
	imagefill($preview, 0, 0, $alpha);
	
	
			
			//голова
			imagecopy($preview, $skin, 4 * $ratio, 0 * $ratio, 8 * $ratio, 8 * $ratio, 8 * $ratio, 8 * $ratio);
			//тело
			imagecopy($preview, $skin, 4 * $ratio, 8 * $ratio, 20 * $ratio, 20 * $ratio, 8 * $ratio, 12 * $ratio);
			//руки
			imagecopy($preview, $skin, 0 * $ratio, 8 * $ratio, 44 * $ratio, 20 * $ratio, 4 * $ratio, 12 * $ratio);
			_imageflip($preview, $skin, 12 * $ratio, 8 * $ratio, 44 * $ratio, 20 * $ratio, 4 * $ratio, 12 * $ratio);
			//ноги
			imagecopy($preview, $skin, 4 * $ratio, 20 * $ratio, 4 * $ratio, 20 * $ratio, 4 * $ratio, 12 * $ratio);
			_imageflip($preview, $skin, 8 * $ratio, 20 * $ratio, 4 * $ratio, 20 * $ratio, 4 * $ratio, 12 * $ratio); 
	
	$zoom_k = 1 ;
	$fullsize = imagecreatetruecolor(90 * $zoom_k, 180 * $zoom_k);
	
	imagesavealpha($fullsize, true);
	$alpha = imagecolorallocatealpha($fullsize, 255, 255, 255, 127);
	imagefill($fullsize, 0, 0, $alpha);
	
	imagecopyresized($fullsize, $preview, 0, 0, 0, 0, imagesx($fullsize), imagesy($fullsize), imagesx($preview), imagesy($preview));
	
	header('Content-type: image/png');
	imagepng($fullsize);
	imagedestroy($preview);
	imagedestroy($fullsize);
	imagedestroy($skin);
	if ( $path_to_cloak != false ) imagedestroy($cloak);
	
	function _imageflip(&$result, &$img, $rx = 0, $ry = 0, $x = 0, $y = 0, $size_x = null, $size_y = null)
	{
		if ( $size_x  < 1 ) $size_x = imagesx($img);
		if ( $size_y  < 1 ) $size_y = imagesy($img);
	 
		imagecopyresampled($result, $img, $rx, $ry, ($x + $size_x-1), $y, $size_x, $size_y, 0-$size_x, $size_y);
	}
?>

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