diff --git a/framework/yii/debug/LogTarget.php b/framework/yii/debug/LogTarget.php
index 33c81eb..31bca6e 100644
--- a/framework/yii/debug/LogTarget.php
+++ b/framework/yii/debug/LogTarget.php
@@ -45,7 +45,7 @@ class LogTarget extends Target
 		if (!is_dir($path)) {
 			mkdir($path);
 		}
-		$indexFile = "$path/index.json";
+		$indexFile = "$path/index.php";
 		if (!is_file($indexFile)) {
 			$manifest = array();
 		} else {
@@ -62,7 +62,7 @@ class LogTarget extends Target
 		);
 		$this->gc($manifest);
 
-		$dataFile = "$path/{$this->tag}.json";
+		$dataFile = "$path/{$this->tag}.php";
 		$data = array();
 		foreach ($this->module->panels as $id => $panel) {
 			$data[$id] = $panel->save();
@@ -93,7 +93,7 @@ class LogTarget extends Target
 		if (count($manifest) > $this->module->historySize + 10) {
 			$n = count($manifest) - $this->module->historySize;
 			foreach (array_keys($manifest) as $tag) {
-				$file = $this->module->dataPath . "/$tag.json";
+				$file = $this->module->dataPath . "/$tag.php";
 				@unlink($file);
 				unset($manifest[$tag]);
 				if (--$n <= 0) {
diff --git a/framework/yii/debug/controllers/DefaultController.php b/framework/yii/debug/controllers/DefaultController.php
index b00881b..2026dc7 100644
--- a/framework/yii/debug/controllers/DefaultController.php
+++ b/framework/yii/debug/controllers/DefaultController.php
@@ -74,7 +74,7 @@ class DefaultController extends Controller
 	protected function getManifest()
 	{
 		if ($this->_manifest === null) {
-			$indexFile = $this->module->dataPath . '/index.json';
+			$indexFile = $this->module->dataPath . '/index.php';
 			if (is_file($indexFile)) {
 				$this->_manifest = array_reverse(unserialize(file_get_contents($indexFile)), true);
 			} else {
@@ -88,7 +88,7 @@ class DefaultController extends Controller
 	{
 		$manifest = $this->getManifest();
 		if (isset($manifest[$tag])) {
-			$dataFile = $this->module->dataPath . "/$tag.json";
+			$dataFile = $this->module->dataPath . "/$tag.php";
 			$data = unserialize(file_get_contents($dataFile));
 			foreach ($this->module->panels as $id => $panel) {
 				if (isset($data[$id])) {