Phpstan discovered some problems

src/EventDispatcher.php

@@ -60,6 +60,6 @@ public function dispatch(object $event)
 
     protected function call(string $class, object $event): void
     {
-        do_action($this->prefix . $class, $event);
+        \do_action($this->prefix . $class, $event);
     }
 }

src/ParameterDeriver.php

@@ -73,7 +73,7 @@ public static function getParameterType($callable): string
      *
      * @param callable $callable
      *
-     * @return True if the callable represents a function, false otherwise.
+     * @return bool True if the callable represents a function, false otherwise.
      */
     protected static function isFunctionCallable(callable $callable): bool
     {
@@ -86,7 +86,7 @@ protected static function isFunctionCallable(callable $callable): bool
      *
      * @param callable $callable
      *
-     * @return True if the callable represents a closure object, false otherwise.
+     * @return bool True if the callable represents a closure object, false otherwise.
      */
     protected static function isClosureCallable(callable $callable): bool
     {
@@ -98,7 +98,7 @@ protected static function isClosureCallable(callable $callable): bool
      *
      * @param callable $callable
      *
-     * @return True if the callable represents a method object, false otherwise.
+     * @return bool True if the callable represents a method object, false otherwise.
      */
     protected static function isObjectCallable(callable $callable): bool
     {
@@ -120,7 +120,7 @@ protected static function isObjectCallable(callable $callable): bool
      *
      * @param callable $callable
      *
-     * @return True if the callable represents a static method, false otherwise.
+     * @return bool True if the callable represents a static method, false otherwise.
      */
     protected static function isClassCallable($callable): bool
     {
@@ -132,7 +132,7 @@ protected static function isClassCallable($callable): bool
      *
      * @param callable $callable
      *
-     * @return True if the callable represents an invokable object, false otherwise.
+     * @return bool True if the callable represents an invokable object, false otherwise.
      */
     private static function isInvokable(callable $callable): bool
     {

src/functions.php

@@ -28,7 +28,7 @@
 function listen(callable $callable, int $priority = 10, string $prefix = EventDispatcher::DEFAULT_PREFIX): void
 {
     $class = ParameterDeriver::getParameterType($callable);
-    add_action($prefix . $class, static function (object $subject) use ($callable) {
+    \add_action($prefix . $class, static function (object $subject) use ($callable) {
         if ($subject instanceof StoppableEventInterface && $subject->isPropagationStopped()) {
             return;
         }