image convert

function compress_image($source_url, $destination_url, $quality) {
	$info = getimagesize($source_url);

	if ($info['mime'] == 'image/jpeg') $image = imagecreatefromjpeg($source_url);
	elseif ($info['mime'] == 'image/gif') $image = imagecreatefromgif($source_url);
	elseif ($info['mime'] == 'image/png') $image = imagecreatefrompng($source_url);

	//save it
	imagejpeg($image, $destination_url, $quality);

	//return destination file url
	return $destination_url;
}

$source_photo = 'uploads/im.png';
$dest_photo = 'uploads/im.png';

$d = compress_image($source_photo, $dest_photo, 50); //50 merupakan berapa persen mau di kecilin pixelnya,semakin kecil persennya semakin besar pixel yg di tampilkan

echo '
<div style="float:left;margin-right:10px">
	<img src="'.$source_photo.'" alt="" />
	<br />'.filesize($source_photo).' Bytes
</div>

<div style="float:left;">
	<img src="'.$dest_photo.'" alt="" />
	<br />'.filesize($dest_photo).' Bytes
</div>
';