Edit Query does not work pleas any advice
This code is spposed to update an article that's already in the DB with the changes made at Edit webpage but it does not work, it display the current article but whenI make changes and click "save" nothing changes   

    mysql_select_db("scms", $con );  
    $show_world="show_world";
    define("IMG_URL", "http://localhost/project/show/show_home/images/");
    define("ABS_PATH",dirname(__FILE__));
    define("IMG_PATH",dirname(__FILE__)."/");
    $id = $_GET['id'];
    $sql = "select * FROM $show_world where id = $id";
    $result=mysql_query($sql);
	$row = mysql_fetch_array($result);
	if(isset($_POST['save'])) {
		$id = $_POST['id'];
		$topic = $_POST['topic'];
		$author = $_POST['author'];
		$content = $_POST['content'];
		$picture = $_POST['picture'];
		$date = $_POST['date'];
		$sql = "UPDATE $show_world SET topic='".$topic."',author='".$author."', content='".$content."', date='".$date."' ";
		
Edit Query does not work pleas any advice
===

This code is spposed to update an article that's already in the DB with the changes made at Edit webpage but it does not work, it display the current article but whenI make changes and click "save" nothing changes   

    mysql_select_db("scms", $con );  
    $show_world="show_world";
    define("IMG_URL", "http://localhost/project/show/show_home/images/");
    define("ABS_PATH",dirname(__FILE__));
    define("IMG_PATH",dirname(__FILE__)."/");
    $id = $_GET['id'];
    $sql = "select * FROM $show_world where id = $id";
    $result=mysql_query($sql);
	$row = mysql_fetch_array($result);
	if(isset($_POST['save'])) {
		$id = $_POST['id'];
		$topic = $_POST['topic'];
		$author = $_POST['author'];
		$content = $_POST['content'];
		$picture = $_POST['picture'];
		$date = $_POST['date'];
		$sql = "UPDATE $show_world SET topic='".$topic."',author='".$author."', content='".$content."', date='".$date."' ";
		