enh(php) add support for Anonymous functions (closures)

CHANGES.md

@@ -22,6 +22,7 @@ Core Grammars:
 - fix(ruby) - fix `|=` operator false positives (as block arguments) [Aboobacker MK]
 - fix(sql) - Fixed sql primary key and foreign key spacing issue   [Dxuian]
 - fix(cpp) added flat_set and flat_map as a part of cpp 23 version [Lavan]
+- enh(php) add support for Anonymous functions (closures) [Wojciech Kania][]
 
 New Grammars:
 
@@ -55,6 +56,7 @@ CONTRIBUTORS
 [Osmocom]: https://github.com/osmocom
 [Álvaro Mondéjar]: https://github.com/mondeja
 [Lavan]: https://github.com/jvlavan
+[Wojciech Kania]: https://github.com/wkania
 
 
 ## Version 11.10.0

src/languages/php.js

@@ -401,6 +401,40 @@ export default function(hljs) {
     scope: 'attr',
     match: regex.concat(IDENT_RE, regex.lookahead(':'), regex.lookahead(/(?!::)/)),
   };
+
+  const FUNCTION_DECLARATION = {
+    scope: 'function',
+    relevance: 0,
+    beginKeywords: 'fn function',
+    end: /[;{]/,
+    excludeEnd: true,
+    illegal: '[$%\\[]',
+    contains: [
+      { beginKeywords: 'use', },
+      hljs.UNDERSCORE_TITLE_MODE,
+      {
+        begin: '=>', // No markup, just a relevance booster
+        endsParent: true
+      },
+      {
+        scope: 'params',
+        begin: '\\(',
+        end: '\\)',
+        excludeBegin: true,
+        excludeEnd: true,
+        keywords: KEYWORDS,
+        contains: [
+          'self',
+          VARIABLE,
+          LEFT_AND_RIGHT_SIDE_OF_DOUBLE_COLON,
+          hljs.C_BLOCK_COMMENT_MODE,
+          STRING,
+          NUMBER
+        ]
+      },
+    ]
+  };
+
   const PARAMS_MODE = {
     relevance: 0,
     begin: /\(/,
@@ -414,8 +448,10 @@ export default function(hljs) {
       STRING,
       NUMBER,
       CONSTRUCTOR_CALL,
+      FUNCTION_DECLARATION,
     ],
   };
+
   const FUNCTION_INVOKE = {
     relevance: 0,
     match: [
@@ -528,38 +564,7 @@ export default function(hljs) {
         },
       },
       CONSTRUCTOR_CALL,
-      {
-        scope: 'function',
-        relevance: 0,
-        beginKeywords: 'fn function',
-        end: /[;{]/,
-        excludeEnd: true,
-        illegal: '[$%\\[]',
-        contains: [
-          { beginKeywords: 'use', },
-          hljs.UNDERSCORE_TITLE_MODE,
-          {
-            begin: '=>', // No markup, just a relevance booster
-            endsParent: true
-          },
-          {
-            scope: 'params',
-            begin: '\\(',
-            end: '\\)',
-            excludeBegin: true,
-            excludeEnd: true,
-            keywords: KEYWORDS,
-            contains: [
-              'self',
-              VARIABLE,
-              LEFT_AND_RIGHT_SIDE_OF_DOUBLE_COLON,
-              hljs.C_BLOCK_COMMENT_MODE,
-              STRING,
-              NUMBER
-            ]
-          },
-        ]
-      },
+      FUNCTION_DECLARATION,
       {
         scope: 'class',
         variants: [

test/markup/php/functions.expect.txt

@@ -7,6 +7,15 @@
     <span class="hljs-keyword">return</span> <span class="hljs-variable">$x</span> + <span class="hljs-variable">$y</span>;
 };
 
+<span class="hljs-comment">/**
+ * Anonymous function
+ */</span>
+<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">hello</span>(<span class="hljs-params"><span class="hljs-keyword">string</span> <span class="hljs-variable">$name</span></span>) </span>{
+    <span class="hljs-keyword">return</span> <span class="hljs-title function_ invoke__">trim</span>(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) <span class="hljs-keyword">use</span> (<span class="hljs-params"><span class="hljs-variable">$name</span></span>) </span>{
+        <span class="hljs-keyword">echo</span> <span class="hljs-string">&quot;Hello; <span class="hljs-subst">$name</span>&quot;</span>;
+    });
+}
+
 <span class="hljs-comment">/**
  * Function invoke
  */</span>
@@ -49,3 +58,4 @@
     <span class="hljs-attr">label</span>: <span class="hljs-string">&#x27;foo&#x27;</span>,
     <span class="hljs-attr">time</span>:<span class="hljs-title function_ invoke__">time</span>() + <span class="hljs-keyword">array</span>(<span class="hljs-number">5</span>)[<span class="hljs-number">0</span>] + <span class="hljs-title class_">Foo</span>::<span class="hljs-variable constant_">HOUR</span>,
 );
+

test/markup/php/functions.txt

@@ -7,6 +7,15 @@ $fn2 = function ($x) use ($y) {
     return $x + $y;
 };
 
+/**
+ * Anonymous function
+ */
+function hello(string $name) {
+    return trim(function() use ($name) {
+        echo "Hello; $name";
+    });
+}
+
 /**
  * Function invoke
  */
@@ -49,3 +58,4 @@ setAlarm(
     label: 'foo',
     time:time() + array(5)[0] + Foo::HOUR,
 );
+