From e455269ba384eab6fcdbf4a74f27da87d7a4a190 Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Thu, 21 Mar 2013 08:33:19 +0100
Subject: [PATCH] [Debug] ensured that the Debug tools can only be registered
 once

---
 src/Symfony/Component/Debug/Debug.php          | 18 ++++++++++++++++++
 src/Symfony/Component/Debug/ErrorHandler.php   |  2 +-
 .../Component/Debug/ExceptionHandler.php       |  2 +-
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Component/Debug/Debug.php b/src/Symfony/Component/Debug/Debug.php
index d7edc8d2b257..c265ba65b2c3 100644
--- a/src/Symfony/Component/Debug/Debug.php
+++ b/src/Symfony/Component/Debug/Debug.php
@@ -20,8 +20,26 @@
  */
 class Debug
 {
+    private static $enabled = false;
+
+    /**
+     * Enables the debug tools.
+     *
+     * This method registers an error handler and an exception handler.
+     *
+     * If the Symfony ClassLoader component is available, a special
+     * class loader is also registered.
+     *
+     * @param integer $errorReportingLevel The level of error reporting you wan
+     */
     public static function enable($errorReportingLevel = null)
     {
+        if (static::$enabled) {
+            return;
+        }
+
+        static::$enabled = true;
+
         error_reporting(-1);
         ini_set('display_errors', 0);
 
diff --git a/src/Symfony/Component/Debug/ErrorHandler.php b/src/Symfony/Component/Debug/ErrorHandler.php
index a12a625ed286..b0843c1b01c6 100644
--- a/src/Symfony/Component/Debug/ErrorHandler.php
+++ b/src/Symfony/Component/Debug/ErrorHandler.php
@@ -47,7 +47,7 @@ class ErrorHandler
     private static $logger;
 
     /**
-     * Register the error handler.
+     * Registers the error handler.
      *
      * @param integer $level The level at which the conversion to Exception is done (null to use the error_reporting() value and 0 to disable)
      *
diff --git a/src/Symfony/Component/Debug/ExceptionHandler.php b/src/Symfony/Component/Debug/ExceptionHandler.php
index 903ae686ca11..cd781b560977 100644
--- a/src/Symfony/Component/Debug/ExceptionHandler.php
+++ b/src/Symfony/Component/Debug/ExceptionHandler.php
@@ -41,7 +41,7 @@ public function __construct($debug = true, $charset = 'UTF-8')
     }
 
     /**
-     * Register the exception handler.
+     * Registers the exception handler.
      *
      * @param Boolean $debug
      *