Função de upload e resize de imagem

submit_resize.php

function resizeImage($file, $savePath){

             define ('MAX_WIDTH', 2500);//max image width
             define ('MAX_HEIGHT', 2500);//max image height
             define ('MAX_FILE_SIZE', 10485760);

             //iamge save path
             $path = $savePath.'/';

            //size of the resize image
             $new_width = 64;
             $new_height = 64;

            //name of the new image
            //$nameOfFile = 'resize_'.$new_width.'x'.$new_height.'_'.basename($file['name']);
            $nameOfFile = md5($file['tmp_name']).basename($file['name']);

            $image_type = $file['type'];
            $image_size = $file['size'];
            $image_error = $file['error'];
            $image_file = $file['tmp_name'];
            $image_name = $file['name'];

            $image_info = getimagesize($image_file);

            //check image type
            if ($image_info['mime'] == 'image/jpeg' or $image_info['mime'] == 'image/jpg'){
            }
            else if ($image_info['mime'] == 'image/png'){
            }
            else if ($image_info['mime'] == 'image/gif'){
            }
            else{
                //set error invalid file type
            }

            if ($image_error){
                //set error image upload error
            }

            if ( $image_size > MAX_FILE_SIZE ){
                //set error image size invalid
            }

            switch ($image_info['mime']) {
                case 'image/jpg': //This isn't a valid mime type so we should probably remove it
                case 'image/jpeg':
                $image = imagecreatefromjpeg ($image_file);
                break;
                case 'image/png':
                $image = imagecreatefrompng ($image_file);
                break;
                case 'image/gif':
                $image = imagecreatefromgif ($image_file);
                break;
            }

            if ($new_width == 0 && $new_height == 0) {
                $new_width = 100;
                $new_height = 100;
            }

            // ensure size limits can not be abused
            $new_width = min ($new_width, MAX_WIDTH);
            $new_height = min ($new_height, MAX_HEIGHT);

            //get original image h/w
            $width = imagesx ($image);
            $height = imagesy ($image);

            //$align = 'b';
            $zoom_crop = 1;
            $origin_x = 0;
            $origin_y = 0;
            //TODO setting Memory

            // generate new w/h if not provided
            if ($new_width && !$new_height) {
                $new_height = floor ($height * ($new_width / $width));
            } else if ($new_height && !$new_width) {
                $new_width = floor ($width * ($new_height / $height));
            }

            // scale down and add borders
        if ($zoom_crop == 3) {

             $final_height = $height * ($new_width / $width);

             if ($final_height > $new_height) {
                $new_width = $width * ($new_height / $height);
             } else {
                $new_height = $final_height;
             }

        }

            // create a new true color image
            $canvas = imagecreatetruecolor ($new_width, $new_height);
            imagealphablending ($canvas, false);


            // if (strlen ($canvas_color) < 6) {
            //     $canvas_color = 'ffffff';
            // }
            $canvas_color = 'ffffff';

            $canvas_color_R = hexdec (substr ($canvas_color, 0, 2));
            $canvas_color_G = hexdec (substr ($canvas_color, 2, 2));
            $canvas_color_B = hexdec (substr ($canvas_color, 2, 2));

            // Create a new transparent color for image
            $color = imagecolorallocatealpha ($canvas, $canvas_color_R, $canvas_color_G, $canvas_color_B, 127);

            // Completely fill the background of the new image with allocated color.
            imagefill ($canvas, 0, 0, $color);

            // scale down and add borders
        if ($zoom_crop == 2) {

                $final_height = $height * ($new_width / $width);

            if ($final_height > $new_height) {
                $origin_x = $new_width / 2;
                $new_width = $width * ($new_height / $height);
                $origin_x = round ($origin_x - ($new_width / 2));
                } else {

                $origin_y = $new_height / 2;
                $new_height = $final_height;
                $origin_y = round ($origin_y - ($new_height / 2));

            }

        }

            // Restore transparency blending
            imagesavealpha ($canvas, true);

            if ($zoom_crop > 0) {

                $src_x = $src_y = 0;
                $src_w = $width;
                $src_h = $height;

                $cmp_x = $width / $new_width;
                $cmp_y = $height / $new_height;

                // calculate x or y coordinate and width or height of source
                if ($cmp_x > $cmp_y) {
            $src_w = round ($width / $cmp_x * $cmp_y);
            $src_x = round (($width - ($width / $cmp_x * $cmp_y)) / 2);
                } else if ($cmp_y > $cmp_x) {
            $src_h = round ($height / $cmp_y * $cmp_x);
            $src_y = round (($height - ($height / $cmp_y * $cmp_x)) / 2);
                }

                // positional cropping!
            if (isset($align)) {
                if (strpos ($align, 't') !== false) {
                    $src_y = 0;
                }
                            if (strpos ($align, 'b') !== false) {
                                    $src_y = $height - $src_h;
                            }
                            if (strpos ($align, 'l') !== false) {
                    $src_x = 0;
                }
                if (strpos ($align, 'r') !== false) {
                    $src_x = $width - $src_w;
                }
            }

                // positional cropping!
                imagecopyresampled ($canvas, $image, $origin_x, $origin_y, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h);

             } else {
            imagecopyresampled ($canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
        }
            //Straight from Wordpress core code. Reduces filesize by up to 70% for PNG's
            if ( (IMAGETYPE_PNG == $image_info[2] || IMAGETYPE_GIF == $image_info[2]) && function_exists('imageistruecolor') && !imageistruecolor( $image ) && imagecolortransparent( $image ) > 0 ){
                imagetruecolortopalette( $canvas, false, imagecolorstotal( $image ) );
        }
            $quality = 100;
            //$nameOfFile = 'resize_'.$new_width.'x'.$new_height.'_'.basename($file['name']);

        if (preg_match('/^image\/(?:jpg|jpeg)$/i', $image_info['mime'])){
            imagejpeg($canvas, $path.$nameOfFile, $quality);

        } else if (preg_match('/^image\/png$/i', $image_info['mime'])){
            imagepng($canvas, $path.$nameOfFile, floor($quality * 0.09));

        } else if (preg_match('/^image\/gif$/i', $image_info['mime'])){
            imagegif($canvas, $path.$nameOfFile);

        }

        return $nameOfFile;
    }