Index: wp-settings.php
===================================================================
--- wp-settings.php	(revision 11594)
+++ wp-settings.php	(working copy)
@@ -201,8 +201,16 @@
 timer_start();
 
 // Add define('WP_DEBUG',true); to wp-config.php to enable display of notices during development.
-if (defined('WP_DEBUG') and WP_DEBUG == true) {
+if ( defined('WP_DEBUG') && WP_DEBUG == true ) {
 	error_reporting(E_ALL);
+	// Add define('WP_DEBUG_DISPLAY', false); to wp-config.php to use the globally configured setting for display_errors and not force it to On
+	if ( ! defined('WP_DEBUG_DISPLAY') || WP_DEBUG_DISPLAY == true )
+		ini_set('display_errors', 1);
+	// Add define('WP_DEBUG_LOG', true); to enable php debug logging to WP_CONTENT_DIR/debug.log
+	if ( defined('WP_DEBUG_LOG') && WP_DEBUG_LOG == true ) {
+		ini_set('log_errors', 1);
+		ini_set('error_log', WP_CONTENT_DIR . '/debug.log');
+	}
 } else {
 	if ( defined('E_RECOVERABLE_ERROR') )
 		error_reporting(E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR);