php: Add runnable tests

extensions/php/languages/php/highlights.scm

@@ -122,3 +122,4 @@
 "try" @keyword
 "use" @keyword
 "while" @keyword
+"yield" @keyword

extensions/php/languages/php/runnables.scm

@@ -0,0 +1,31 @@
+(
+    ; Class that follow the naming convention of PHPUnit test classes
+    ; and that doesn't have the abstract modifier
+    ; and have a method that follow the naming convention of PHPUnit test methods
+    ; and the method is public
+    (class_declaration
+        modifier: (_)? @modifier
+        (#not-eq? @modifier "abstract")
+        name: (_) @name
+        (#match? @name ".*Test")
+        body: (declaration_list
+            (method_declaration
+                (visibility_modifier)? @visibility
+                (#eq? @visibility "public")
+                name: (_) @run
+                (#match? @run "test.*")
+            )
+        )
+    )
+) @php-test
+
+; Class that follow the naming convention of PHPUnit test classes
+; and that doesn't have the abstract modifier
+(
+    (class_declaration
+        modifier: (_)? @modifier
+        (#not-eq? @modifier "abstract")
+        name: (_) @run
+        (#match? @run ".*Test")
+    )
+) @php-test

extensions/php/languages/php/tasks.json

@@ -0,0 +1,8 @@
+[
+  {
+    "label": "php test $ZED_SYMBOL",
+    "command": "vendor/bin/phpunit",
+    "args": ["--filter=$ZED_SYMBOL"],
+    "tags": ["php-test"]
+  }
+]