[CodingStyle][Php81] Skip used by caller variable on FunctionLikeToFirstClassCallableRector (#7519)

* [CodingStyle][Php81] Skip used by caller variable on FunctionLikeToFirstClassCallableRector

* fix

Author: samsonasik

rules-tests/CodingStyle/Rector/FunctionLike/FunctionLikeToFirstClassCallableRector/Fixture/skip_used_by_caller_variable.php.inc

@@ -0,0 +1,12 @@
+<?php
+
+namespace Rector\Tests\CodingStyle\Rector\FunctionLike\FunctionLikeToFirstClassCallableRector\Fixture;
+
+$fn = function ($foo)
+{
+    return $foo($foo);
+};
+
+var_dump($fn('strlen'));
+
+?>

rules/CodingStyle/Rector/FunctionLike/FunctionLikeToFirstClassCallableRector.php

@@ -6,6 +6,7 @@
 
 use PhpParser\Node;
 use PhpParser\Node\Arg;
+use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\ArrowFunction;
 use PhpParser\Node\Expr\CallLike;
 use PhpParser\Node\Expr\Closure;
@@ -133,6 +134,11 @@ private function extractCallLike(Closure|ArrowFunction $node): FuncCall|MethodCa
             return null;
         }
 
+        // dynamic name? skip
+        if ($callLike->name instanceof Expr) {
+            return null;
+        }
+
         return $callLike;
     }