Change boolean constnats

marc-mabe · marc-bennewitz@arcor.de · commit ef1a12e798a9 · 2013-10-21T09:51:13.000+02:00
diff --git a/README.md b/README.md
@@ -1,4 +1,8 @@
-php-behaviour
-=============
-
 List of PHP behaviours you don't expect
+=======================================
+
+* String/Integer/Resource comparison
+* [Change boolean constants TRUE/FALSE](change_boolean_constants.md)
+* Type conversion on array keys
+* Late constants linking
+* Reference returning
diff --git a/change_boolean_constants.md b/change_boolean_constants.md
@@ -0,0 +1,31 @@
+Change boolean constants TRUE/FALSE (within a namespace)
+========================================================
+
+Example:
+--------
+(http://3v4l.org/hq7Jj)
+
+Because TRUE and FALSE are constants of the root namespace
+you can define your own constants within another namespace.
+
+```php
+namespace Foo;
+define('Foo\\true', \false);
+define('Foo\\false', \true);
+
+var_dump(array(
+    'true'  => true,
+    'false' => false,
+    '1===1' => 1===1,
+    '1!==1' => 1!==1,
+));
+```
+
+```
+array(4) {
+    ["true"]  => bool(false),
+    ["false"] => bool(true),
+    ["1===1"] => bool(true),
+    |"1!==1"] => bool(false)
+}
+```
