Add use function and use const to font-lock-keyword

lisp/php-mode.el

@@ -1396,6 +1396,11 @@ for \\[find-tag] (which see)."
      ("\\_<\\(?:implements\\|extends\\)\\_>" . 'php-class-declaration-spec)
      ;; Namespace declaration
      ("\\_<namespace\\_>" . 'php-namespace-declaration)
+     ;; import constant statement
+     (,(rx symbol-start (group "use" (+ (syntax whitespace)) "const")
+           (+ (syntax whitespace)))
+      (1 'php-import-declaration)
+      (,(rx (group (+ (or (syntax word) (syntax symbol) "\\" "{" "}")))) nil nil (1 'php-constant-assign)))
      ;; import statement
      ("\\_<use\\_>" . 'php-import-declaration)
      ;; Class modifiers (abstract, final)
@@ -1478,6 +1483,11 @@ for \\[find-tag] (which see)."
    ;;   is usually overkill.
    `(
      ("\\<\\(@\\)" 1 'php-errorcontrol-op)
+     ;; import function statement
+     (,(rx symbol-start (group "use" (+ (syntax whitespace)) "function")
+           (+ (syntax whitespace)))
+      (1 'php-import-declaration)
+      (,(rx (group (+ (or (syntax word) (syntax symbol) "\\" "{" "}")))) nil nil (1 'php-function-name t)))
      ;; Highlight function calls
      ("\\(\\_<\\(?:\\sw\\|\\s_\\)+?\\_>\\)\\s-*(" 1 'php-function-call)
      ;; Highlight all upper-cased symbols as constant

tests/lang/import/import-constant.php

@@ -0,0 +1,8 @@
+<?php
+namespace Foo;
+
+use const Foo\BAR;
+use const Foo\{BUZ, BUZBUZ};
+use const PHP_VERSION;
+
+const FOO = 'bar';

tests/lang/import/import-constant.php.faces

@@ -0,0 +1,31 @@
+;; -*- mode: emacs-lisp -*-
+(("<?php" . php-php-tag)
+ ("\n")
+ ("namespace" . php-namespace-declaration)
+ (" ")
+ ("Foo" . font-lock-type-face)
+ (";\n\n")
+ ("use const" . php-import-declaration)
+ (" ")
+ ("Foo\\" . php-constant-assign)
+ ("BAR" . font-lock-type-face)
+ (";\n")
+ ("use const" . php-import-declaration)
+ (" ")
+ ("Foo" . font-lock-type-face)
+ ("\\{BUZ" . php-constant-assign)
+ (", ")
+ ("BUZBUZ}" . php-constant-assign)
+ (";\n")
+ ("use const" . php-import-declaration)
+ (" ")
+ ("PHP_VERSION" . font-lock-type-face)
+ (";\n\n")
+ ("const" . php-keyword)
+ (" ")
+ ("FOO" . font-lock-type-face)
+ (" ")
+ ("=" . php-assignment-op)
+ (" ")
+ ("'bar'" . php-string)
+ (";\n"))

tests/lang/import/import-function.php

@@ -0,0 +1,7 @@
+<?php
+namespace Foo;
+
+use function var_dump;
+use function is_array, is_string, is_dir;
+use function Safe\json_encode;
+use function Safe\{file_get_contents, json_decode};

tests/lang/import/import-function.php.faces

@@ -0,0 +1,37 @@
+;; -*- mode: emacs-lisp -*-
+(("<?php" . php-php-tag)
+ ("\n")
+ ("namespace" . php-namespace-declaration)
+ (" ")
+ ("Foo" . font-lock-type-face)
+ (";\n\n")
+ ("use" . php-import-declaration)
+ (" ")
+ ("function" . php-keyword)
+ (" ")
+ ("var_dump" . php-function-name)
+ (";\n")
+ ("use" . php-import-declaration)
+ (" ")
+ ("function" . php-keyword)
+ (" ")
+ ("is_array" . php-function-name)
+ (", ")
+ ("is_string" . php-function-name)
+ (", ")
+ ("is_dir" . php-function-name)
+ (";\n")
+ ("use" . php-import-declaration)
+ (" ")
+ ("function" . php-keyword)
+ (" ")
+ ("Safe\\json_encode" . php-function-name)
+ (";\n")
+ ("use" . php-import-declaration)
+ (" ")
+ ("function" . php-keyword)
+ (" ")
+ ("Safe\\{file_get_contents" . php-function-name)
+ (", ")
+ ("json_decode}" . php-function-name)
+ (";\n"))

tests/php-mode-test.el

@@ -683,6 +683,8 @@ Meant for `php-mode-test-issue-503'."
   (with-php-mode-test ("lang/doc-comment/return-type.php" :faces t))
   (with-php-mode-test ("lang/function/calls.php" :faces t))
   (with-php-mode-test ("lang/function/closure.php" :indent t :magic t :faces t))
+  (with-php-mode-test ("lang/import/import-constant.php" :faces t))
+  (with-php-mode-test ("lang/import/import-function.php" :faces t))
   (with-php-mode-test ("lang/try-cactch/multiple.php" :faces t))
   (with-php-mode-test ("lang/types/cast.php" :faces t))
   (with-php-mode-test ("lang/types/function.php" :faces t))