Sourcecodes - Image Klasse

Code:

class image {
        function image_type($image) {
                /* $image ist der Dateipfad */
gibt die Dateiendung zurück (wichtig für das Speichern der Dateien) */
                $image_size=getimagesize($image);
                if($image_size[2]<1||$image_size[2]>3)
                        die('falsches Format! nur jpg, png und gif erlaubt!');
                switch($image_size[2]) {
                        case 1:
                                $image_type='.gif';
                                break;
                        case 2:
                                $image_type='.jpg';
                                break;
                        case 3:
                                $image_type='.png';
                                break;
                }
                return $image_type;
        }

        function image_create($image,$image_type) {
                /* $image..Dateipfad
                switch($image_type) {
                        case 1:
                                $image_new=imagecreatefromgif($image);
                                break;
                        case 2:
                                $image_new=imagecreatefromjpeg($image);
                                break;
                        case 3:
                                $image_new=imagecreatefrompng($image);
                                break;
                }
                return $image_new;
        }

        function image_resize($image,$image_max_width,$image_max_height,$image_proportional) {
                /* $image..Dateipfad, $image_proportional..TRUE/FALSE */
                $image_size=getimagesize($image);
                if($image_size[2]<1||$image_size[2]>3)
                 die('falsches format! nur jpg, png und gif erlaubt!');
                if($image_proportional) {
                        $resize_factor=min($image_max_width/$image_size[0],$image_max_height/$image_size[1]);
                        $image_new_width=$image_size[0]*$resize_factor;
                        $image_new_height=$image_size[1]*$resize_factor; }
                else {
                        $image_new_width=$image_max_width;
                        $image_new_height=$image_max_height; }
                $image_orginal=$this->image_create($image,$image_size[2]);
                $image_resized=imagecreatetruecolor($image_new_width,$image_new_height);

                imagecopyresized($image_resized,$image_orginal,0,0,0,0,$image_new_width,$image_new_height,$image_size[0],$image_size[1]);
                return $image_resized;
        }
}