From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Thu, 14 Jun 2012 15:00:28 +0000 (+0200)
Subject: fixed escaping when a project defines a function named html or js (closes #724)
X-Git-Url: http://git.silmor.de/gitweb/?a=commitdiff_plain;h=0d5dbedef51a23b0ef4384c0f9fc58c7cc48cc2a;p=web%2Fkonrad%2Ftwig.git

fixed escaping when a project defines a function named html or js (closes #724)
---

diff --git a/CHANGELOG b/CHANGELOG
index 83d512d..dbd1c96 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 * 1.8.3 (2012-XX-XX)
 
+ * fixed escaping when a project defines a function named html or js
  * fixed chmod mode to apply the umask correctly
 
 * 1.8.2 (2012-05-30)
diff --git a/doc/api.rst b/doc/api.rst
index 96bb6ed..a462066 100644
--- a/doc/api.rst
+++ b/doc/api.rst
@@ -98,7 +98,8 @@ The following options are available:
   for all templates (default to ``true``). As of Twig 1.8, you can set the
   escaping strategy to use (``html``, ``js``, ``false`` to disable, or a PHP
   callback that takes the template "filename" and must return the escaping
-  strategy to use).
+  strategy to use -- the callback cannot be a function name to avoid collision
+  with built-in escaping strategies).
 
 * ``optimizations``: A flag that indicates which optimizations to apply
   (default to ``-1`` -- all optimizations are enabled; set it to ``0`` to
diff --git a/lib/Twig/Extension/Escaper.php b/lib/Twig/Extension/Escaper.php
index b0aa8b1..c02c3a8 100644
--- a/lib/Twig/Extension/Escaper.php
+++ b/lib/Twig/Extension/Escaper.php
@@ -76,7 +76,9 @@ class Twig_Extension_Escaper extends Twig_Extension
      */
     public function getDefaultStrategy($filename)
     {
-        if (is_callable($this->defaultStrategy)) {
+        // disable string callables to avoid calling a function named html or js,
+        // or any other upcoming escaping strategy
+        if (!is_string($this->defaultStrategy) && is_callable($this->defaultStrategy)) {
             return call_user_func($this->defaultStrategy, $filename);
         }
 
diff --git a/test/Twig/Tests/integrationTest.php b/test/Twig/Tests/integrationTest.php
index 18aba2a..b905b56 100644
--- a/test/Twig/Tests/integrationTest.php
+++ b/test/Twig/Tests/integrationTest.php
@@ -9,6 +9,13 @@
  * file that was distributed with this source code.
  */
 
+// This function is defined to check that escaping strategies
+// like html works even if a function with the same name is defined.
+function html()
+{
+    return 'foo';
+}
+
 class Twig_Tests_IntegrationTest extends PHPUnit_Framework_TestCase
 {
     public function getTests()