feat: support attributes on function parameters

Author: MHajoha

file.php

@@ -427,6 +427,17 @@ public function &get_functions() {
                                     continue;
                                 }
                             }
+                            if (version_compare(PHP_VERSION, '8.0.0') >= 0) {
+                                // T_ATTRIBUTE introduced in PHP 8.0.
+                                if ($argtokens[$j][0] === T_ATTRIBUTE) {
+                                    [, $attrclose] = $this->find_tag_pair_inlist($argtokens, $j, "#[", "]");
+                                    if ($attrclose) {
+                                        // Skip the attribute.
+                                        $j = $attrclose;
+                                    }
+                                    continue;
+                                }
+                            }
                             switch ($argtokens[$j][0]) {
                                 // Skip any whitespace, or argument visibility.
                                 case T_COMMENT:

tests/fixtures/phpdoc_method_multiline.php

@@ -96,4 +96,17 @@ public function function_multiline5(
     ): array {
         // Do something.
     }
+
+    /**
+     * One function, what else.
+     *
+     * @param string $arg
+     * @return array
+     */
+    public function function_attribute(
+        #[some_attr]
+        string $arg
+    ): array {
+        // Do something.
+    }
 }