cache prefix for view cache to avoid collisions with domains/languages

app/Config/core.php

@@ -129,6 +129,16 @@
  */
 	//Configure::write('Cache.check', true);
 
+/**
+ * Enable cache view prefixes.
+ *
+ * If set it will be prepended to the cache name for view file caching. This is
+ * helpful if you deploy the same application via multiple subdomains and languages,
+ * for instance. Each version can then have its own view cache namespace.
+ * Note: The final cache file name will then be `prefix_cachefilename`.
+ */
+	//Configure::write('Cache.viewPrefix', 'prefix');
+
 /**
  * Defines the default error type when using the log() function. Used for
  * differentiating error logging and debugging. Currently PHP supports LOG_DEBUG.

lib/Cake/Console/Templates/skel/Config/core.php

@@ -129,6 +129,16 @@
  */
 	//Configure::write('Cache.check', true);
 
+/**
+ * Enable cache view prefixes.
+ *
+ * If set it will be prepended to the cache name for view file caching. This is
+ * helpful if you deploy the same application via multiple subdomains and languages,
+ * for instance. Each version can then have its own view cache namespace.
+ * Note: The final cache file name will then be `prefix_cachefilename`.
+ */
+	//Configure::write('Cache.viewPrefix', 'prefix');
+
 /**
  * Defines the default error type when using the log() function. Used for
  * differentiating error logging and debugging. Currently PHP supports LOG_DEBUG.

lib/Cake/Routing/Filter/CacheDispatcher.php

@@ -42,9 +42,13 @@ public function beforeDispatch(CakeEvent $event) {
 		}
 
 		$path = $event->data['request']->here();
-		if ($path == '/') {
+		if ($path === '/') {
 			$path = 'home';
 		}
+		$prefix = Configure::read('Cache.viewPrefix');
+		if ($prefix) {
+			$path = $prefix . '_' . $path;
+		}
 		$path = strtolower(Inflector::slug($path));
 
 		$filename = CACHE . 'views' . DS . $path . '.php';

lib/Cake/View/Helper/CacheHelper.php

@@ -278,9 +278,13 @@ protected function _writeFile($content, $timestamp, $useCallbacks = false) {
 			$cacheTime = strtotime($timestamp, $now);
 		}
 		$path = $this->request->here();
-		if ($path == '/') {
+		if ($path === '/') {
 			$path = 'home';
 		}
+		$prefix = Configure::read('Cache.viewPrefix');
+		if ($prefix) {
+			$path = $prefix . '_' . $path;
+		}
 		$cache = strtolower(Inflector::slug($path));
 
 		if (empty($cache)) {