Add namespace declaration face

Author: Demis Balbach

php-face.el

@@ -211,6 +211,11 @@
   :group 'php-faces
   :tag "PHP Class Declaration Specification")
 
+(defface php-namespace-declaration '((t (:inherit php-keyword)))
+  "Face used to highlight namespace declaration keyword."
+  :group 'php-faces
+  :tag "PHP Namespace Declaration")
+
 (define-obsolete-face-alias 'php-annotations-annotation-face 'php-doc-annotation-tag "1.19.0")
 
 (provide 'php-face)

php-mode.el

@@ -1,4 +1,4 @@
-;;; php-mode.el --- Major mode for editing PHP code
+3;;; php-mode.el --- Major mode for editing PHP code
 
 ;; Copyright (C) 2018-2019  Friends of Emacs-PHP development
 ;; Copyright (C) 1999, 2000, 2001, 2003, 2004 Turadg Aleahmad
@@ -1544,6 +1544,9 @@ a completion list."
 
      ;; Class declaration specification keywords (implements, extends)
      ("implements\\|extends" . 'php-class-declaration-spec)
+
+     ;; Namespace declaration
+     ("namespace" .  'php-namespace-declaration)
 
      ;; Highlight variables, e.g. 'var' in '$var' and '$obj->var', but
      ;; not in $obj->var()