db: use builtin classloader, lowercase class files

include/classloader.php

@@ -0,0 +1,15 @@
+<?php
+	function __autoload($class) {
+		$class_file1 = str_replace("_", "/", basename($class));   // PSR-0
+		$class_file2 = str_replace("_", "/", strtolower(basename($class)));
+
+		$file1 = dirname(__FILE__)."/../classes/$class_file1.php";
+		$file2 = dirname(__FILE__)."/../classes/$class_file2.php";
+
+		if (file_exists($file1)) {
+			require $file1;
+		} elseif (file_exists($file2)) {
+			require $file2;
+		}
+	}
+?>

include/db.php

@@ -1,13 +1,9 @@
 <?php
 
 require_once "config.php";
+require_once "classloader.php";
 
-$db_class = 'Db_'.ucfirst(DB_TYPE);
-$db_class_file = 'classes/' . str_replace('_', '/', $db_class) . '.php';
-
-require_once "classes/Db/Interface.php";
-require_once "classes/Db/Abstract.php";
-require_once $db_class_file;
+$db_class = 'db_'.lcfirst(DB_TYPE);
 
 $db = $db_class::instance(); //  call_user_func(array($db_class, 'instance'));
 
@@ -66,4 +62,4 @@ function db_quote($str){
     return $db->quote($str);
 }
 
-?>
+?>

include/functions.php

@@ -5,19 +5,7 @@
 	$fetch_last_error = false;
 	$pluginhost = false;
 
-	function __autoload($class) {
-		$class_file1 = str_replace("_", "/", basename($class));   // PSR-0
-		$class_file2 = str_replace("_", "/", strtolower(basename($class)));
-
-		$file1 = dirname(__FILE__)."/../classes/$class_file1.php";
-		$file2 = dirname(__FILE__)."/../classes/$class_file2.php";
-
-		if (file_exists($file1)) {
-			require $file1;
-		} elseif (file_exists($file2)) {
-			require $file2;
-		}
-	}
+	require_once "classloader.php";
 
 	mb_internal_encoding("UTF-8");
 	date_default_timezone_set('UTC');
@@ -3903,4 +3891,4 @@
 		return in_array($interface, class_implements($class));
 	}
 
-?>
+?>