Re-use the database connection

code/web/private_php/ams/autoload/dblayer.php

@@ -28,6 +28,9 @@
  * @author Daan Janssens, mentored by Matthew Lagoe
  *
  */
+
+$PDOCache = array();
+
 class DBLayer {
 
 	private $PDO;
@@ -44,8 +47,10 @@ class DBLayer {
 	*/
 	function __construct($db, $dbn = null)
 	{
-        if ( $db != "install" ) {
-            
+		global $PDOCache;
+		if (isset($PDOCache[$db])) {
+			$this->PDO = $PDOCache[$db];
+		} else {
 			global $cfg;
 			$dsn = "mysql:";
 			$dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
@@ -57,19 +62,8 @@ class DBLayer {
 				PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
 			);
 			$this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
-             } else {
-            global $cfg;
-             $dsn = "mysql:";
-             $dsn .= "host=" . $cfg['db'][$dbn]['host'] . ";";
-             $dsn .= "port=" . $cfg['db'][$dbn]['port'] . ";";
-            
-             $opt = array( 
-                PDO :: ATTR_ERRMODE => PDO :: ERRMODE_EXCEPTION,
-                 PDO :: ATTR_DEFAULT_FETCH_MODE => PDO :: FETCH_ASSOC
-                 );
-             $this -> PDO = new PDO( $dsn, $_POST['Username'], $_POST['Password'], $opt );
+			$PDOCache[$db] = $this->PDO;
 		}
-        
 	}
 
 	/**
@@ -145,8 +139,7 @@ class DBLayer {
 			$sth -> execute( $data );
 			$this -> PDO -> commit();
 		}
-        catch( Exception $e )
-         {
+		catch ( Exception $e ) {
 			$this -> PDO -> rollBack();
 			throw new Exception( "error selection" );
 			return false;