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+====== PHP RFC: Extended keyword support ======
+  * Version: 1.1
+  * Date: 2013-09-14
+  * Author: Bob Weinand, bobwei9@hotmail.com
+  * Status: Under Discussion
+  * First Published at: http://wiki.php.net/rfc/keywords_as_identifiers
+===== Introduction =====
+This RFC aims to remove some restrictions which are due to the fact that keywords are not included in T_STRING (especially for class const, method and class names).
+===== What is now possible =====
+  * One might want to define an HTTP agent class. And would like to store some HTTP status constants:
+<code php>
+class HTTP {
+    const CONTINUE = 100; // Works with patch
+// But currently this fails with a parse error, because continue is a keyword.
+    const SWITCHING_PROTOCOLS = 101;
+    // etc. ...
+}
+</code>
+  * Building conditions with "and" or "or" methods
+<code php>
+class Cond {
+    public static function and (...) { // using an "and" or "or" as name currently fails
+        // some logic here
+        return $andCondition;
+    }
+    public static function or (...) {
+        // some logic here
+        return $orCondition;
+    }
+}
+Cond::and($cond1, $cond2);
+</code>
+  * Prevents unnecessary use of _****_call magic method ("-****>keyword_name_for_non_static_method()" works, but "public function keyword_name_for_non_static_method() {}" currently fails)
+<code php>
+// Ugly, current code
+class SomeClass {
+    private $list = [];
+    public function _list () {
+        return $this->list;
+    }
+    public function __call ($func, $args) {
+        if (method_exists($this, "_".$func)) {
+            return call_user_func_array("_".$func, $args); // or some similar thing, if not underscores etc....
+        }
+        // some error handling here
+    }
+}
+// How we could write it with the patch
+class SomeClass {
+    private $list = [];
+    public function list () {
+        return $this->list;
+    }
+}
+</code>
+===== Details of proposal =====
+Concretely this patch enables:
+  * all keywords for
+    * method names
+    * class constant names
+    * declare directive names
+  * a limited set of keywords ***** for
+    * class names
+    * trait names
+    * interface names
+    * goto label names
+***** This includes all keywords except
+  * catch
+  * finally
+  * case
+  * default
+  * exit
+  * else
+  * elseif
+  * endif
+  * endwhile
+  * endfor
+  * endforeach
+  * enddeclare
+  * endswitch
+It is necessary to exclude them due to limitations of bison/yacc grammar.
+An example what is possible with this patch:
+<code php>
+namespace Test {
+    class List {
+        const default = 0;
+        public $case = array(array(self::default));
+        public static function echo (List $instance) {
+            var_dump($instance->case);
+        }
+        public function new (array $entry) {
+            $this->case[] = $entry;
+            return $this;
+        }
+    }
+}
+namespace {
+    \Test\List::echo((new Test\List)->new(array(1)));
+}
+</code>
+==== Typehints ====
+Currently when using array or callable as typehint, the old behaviour is preferred over comparing if it's a class/interface named array or callable.
+I'm not sure if we should just allow both in this special case.
+===== Proposed PHP Version(s) =====
+This RFC should go into next PHP 5.x.
+===== Patch =====
+  * The patch is against master
+  * Pull request is at [[https://github.com/php/php-src/pull/438]]
+===== References =====
+  * Mailing List thread at [[http://markmail.org/message/7rn4mbwkbytqa3ig]]
+===== Rejected Features =====
+  * Initially the patch contained also some support for functions, namespaces and constants which was removed later due to some resulting syntactic inconsistencies
+===== Versions =====
+  * 1.0: Initial proposal (16.9.2013)
+  * 1.1: Added some more examples (18.9.2013)

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