Image – Resize Image – PNG to JPEG

	if(substr($_FILES["photo"]["name"], -3) == 'png') {
		png_2_jpg('pics/'.$_FILES["photo"]["name"], 80);
	}
	
	resize_image('path/image.jpg', 500);

	function resize_image($img, $w){
		list($width_orig, $height_orig) = getimagesize($img);
		$dst_width = $w;
		$dst_height = ($dst_width/$width_orig)*$height_orig;
		$im = imagecreatetruecolor($dst_width,$dst_height);
		$image = imagecreatefromjpeg($img);
		imagecopyresampled($im, $image, 0, 0, 0, 0, $dst_width, $dst_height, $width_orig, $height_orig);
		imagejpeg($im, $img);
		imagedestroy($im);
	}

	function png_2_jpg($filePath, $q) {
		$image = imagecreatefrompng($filePath);
		$bg = imagecreatetruecolor(imagesx($image), imagesy($image));
		imagefill($bg, 0, 0, imagecolorallocate($bg, 255, 255, 255));
		imagealphablending($bg, TRUE);
		imagecopy($bg, $image, 0, 0, 0, 0, imagesx($image), imagesy($image));
		imagedestroy($image);
		imagejpeg($bg, $filePath, $q);
		imagedestroy($bg);
	}