new hook system (do not get it confused with events or plugins please)

- introducing two new hookable functions too


git-svn-id: file:///svn/phpbb/trunk@8100 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/includes/cache.php

@@ -403,6 +403,38 @@ class cache extends acm
 
 		return $usernames;
 	}
+
+	/**
+	* Obtain hooks...
+	*/
+	function obtain_hooks()
+	{
+		global $phpbb_root_path, $phpEx;
+
+		if (($hook_files = $this->get('_hooks')) === false)
+		{
+			$hook_files = array();
+
+			// Now search in acp and mods folder for permissions_ files.
+			$dh = @opendir($phpbb_root_path . 'includes/hooks/');
+
+			if ($dh)
+			{
+				while (($file = readdir($dh)) !== false)
+				{
+					if (strpos($file, 'hook_') === 0 && substr($file, -(strlen($phpEx) + 1)) === '.' . $phpEx)
+					{
+						$hook_files[] = substr($file, 0, -(strlen($phpEx) + 1));
+					}
+				}
+				closedir($dh);
+			}
+
+			$this->put('_hooks', $hook_files);
+		}
+
+		return $hook_files;
+	}
 }
 
 ?>