Zwracanie zmienionych wierszy Opcje

[netsprint]

Witam, próbuje wyświetlić wiersze, które zostały zmienione podczas użycia funkcji np. update, insert lub delete. Niestety nie wiem jak zwrócić odpowienio zapytanie... wewnątrz else if($check === 0)

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...
 
function execute($execute)
	{ 
					function do_alert($msg) 
						{
										echo '<script type="text/javascript">alert("' . $msg . '"); </script>';
						}
		$execute =	strtolower($execute);
		$tab = array("update","delete","insert");
		foreach( $tab as $tab2) {
		$check = strpos($execute, $tab2);  
		$res;
							if($tab2 == "insert" && $check == null){
								do_alert('Comand update,delete,insert is on the bad position or you use before comand some white spaces');			
								//throw new Exception( pg_last_error( $this->connection ) );		
								return false;								
							} 
							else if($tab == "insert" && $check === FALSE  && $check !=1)
							{	
								echo $check;
								do_alert('Comand update, delete or insert is not found');	
								//throw new Exception( pg_last_error( $this->connection ) );		
								return false;	
 
							}
							else if($check === 0)
							{		
									$res=pg_query( $this->connection, $execute );	
 
										if ( !is_resource( $res ) ) throw new Exception( pg_last_error( $this->connection ) );
										echo $res;
										return new Resource( $res );
 
									//	return Resource->fetch();
									break;
							} 
 
 
 
		}
	}...
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class Resource
{
	private $resource;
 
	function __construct( $res )
	{
		$this->resource=$res;
	}
 
	function fetch()
	{
  		return pg_fetch_assoc( $this->resource );
	}
 
	function __destruct()
	{
		pg_free_result( $this->resource );
	}
}
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 $db=new Database();
  $result=$db->execute( "update użytkownicy  SET nick='haker'  WHERE nick='maker'" );
 
 
 
 
if ($result) {  
while ( $row = $result->fetch())
  {
  	echo "<tr>";
	foreach ( $row as $col ) echo "<td>$col</td>";
	echo "</tr>";  	
  } 
  }
  $db=null;
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