resize.php

<?php
#! Photo resize controller.
#! Class interface.
interface iResize
{
	public function __construct($filename);
	public function resize($x, $y);
	public function save($locale);
}

#! Class.
class resize implements iResize
{
	private $image, $type;
	public function __construct($filename)
	{
		$img = getimagesize($filename);
		$this->type = $img[2];
		switch($this->type)
		{
			case IMAGETYPE_JPEG:
				$this->image = imagecreatefromjpeg($filename);
				break;
			case IMAGETYPE_GIF:
				$this->image = imagecreatefromgif($filename);
				break;
			case IMAGETYPE_PNG:
				$this->image = imagecreatefrompng($filename);
				break;
			default:
				throw new Exception("Invalid image type.");
		}
	}
	private function axis()
	{
		return (object) array(
			"width"  => imagesx($this->image),
			"height" => imagesy($this->image)
		);
	}
	public function resize($x, $y)
	{
		$new = imagecreatetruecolor($x, $y);
		imagecopyresampled($new, $this->image, 0, 0, 0, 0, $x, $y, $this->axis()->width, $this->axis()->height);
		$this->image = $new;
	}
	public function save($locale)
	{
		switch($this->type)
		{
			case IMAGETYPE_JPEG:
				imagejpeg($this->image, $locale, 75);
				break;
			case IMAGETYPE_GIF:
				imagegif($this->image, $locale);
				break;
			case IMAGETYPE_PNG:
				imagepng($this->image, $locale);
				break;
			default:
				throw new Exception("Invalid image type.");
		}
	}
}