paramImmediatelyInvokedCallable.nonCallable

Code example

<?php declare(strict_types = 1);

/**
 * @param-immediately-invoked-callable $callback
 */
function doFoo(int $callback): void
{
}

Why is it reported?

The @param-immediately-invoked-callable PHPDoc tag is applied to a parameter whose native type is not callable. This tag is used to tell PHPStan that a callable parameter will be invoked immediately within the function (not stored for later use), which affects type narrowing. When the parameter type is not callable, the tag has no meaning.

How to fix it

Change the parameter type to a callable type:

 /**
  * @param-immediately-invoked-callable $callback
  */
-function doFoo(int $callback): void
+function doFoo(callable $callback): void
 {
 }

Or remove the tag if the parameter is not intended to be callable:

-/**
- * @param-immediately-invoked-callable $callback
- */
 function doFoo(int $callback): void
 {
 }