class ImageResize {
	
	public	$imageSize;
	
	function __construct($file, $newFile, $width, $height) {
		
		$this->imageSize = getimagesize($file);
		
		if($imageSize[0] > $width || $imagesSize[1] > $height)
		{
		
			$this->loadImage($file, $this->imageSize, $newFile, $width, $height);
		
		} else {
		
			return false;
		
		}
	
	}

	public function loadImage($file, $size, $newFile, $width, $height) {

		$originalWidth	= '';
		$originalHeight	= '';
		$originalRatio	= '';
		$newWidth		= '';
		$newHeight		= '';
		$fileExtension	= '';
		$tempImage		= '';
		$newImage		= '';
		$newFileName	= '';
		

		
		list($originalWidth, $originalHeight) = $size;
		
		$originalRatio = $originalWidth / $originalHeight;
		
		if($width / $height > $originalRatio)
		{
			
			$newWidth = $height * $originalRatio;
		
		} else {
		
			$newHeight = $width / $originalRatio;
		
		}
		
		$fileExtension = strtolower(pathinfo($file, PATHINFO_EXTENSION));
		
		$newImage = imagecreatetruecolor($width, $height);
		
		$newFileName = $newFile . $fileExtension;
		
		if($fileExtension == 'jpg' || $fileExtension == 'jpeg')
		{
			return $this->resizeJpeg($file, $newFileName, $newImage, $tempImage, $width, $height, $originalWidth, $originalHeight);
					
		} else if($fileExtension == 'gif') {
		
			return $this->resizeGif($file, $newFileName, $newImage, $tempImage, $width, $height, $originalWidth, $originalHeight);
						
		} else if($fileExtension == 'png') {
		
			return $this->resizePng($file, $newFileName, 9, $newImage, $width, $height, $originalWidth, $originalHeight);
		
		} else {
		
			return false;
			
		}		
	
	}
	
	protected function resizeJpeg($file, $newFileName, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefromjpeg($file);
		
		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight);
		
		if(!imagejpeg($newImage, $newFileName, 100))
		{
		
			return false;
		
		}
	
	
	}
	
	protected function resizeGif($file, $newFileName, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefromgif($file);
		
		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight);
		
		if(!imagegif($newImage, $newFileName))
		{
		
			return false;
		
		}		
	
	}
	
	protected function resizePng($file, $newFileName, $quality, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefrompng($file);

		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight)				

		
		if(!imagepng($newImage, $newFileName, $quality))
		{
			return false;
		}	
	
	}
	
}