1--TEST-- 2Closure 027: Testing Closure type-hint 3--FILE-- 4<?php 5 6function test(Closure $a) { 7 var_dump($a()); 8} 9 10 11test(function() { return new stdclass; }); 12 13test(function() { }); 14 15$a = function($x) use ($y) {}; 16try { 17 test($a); 18} catch (Throwable $e) { 19 echo "Exception: " . $e->getMessage() . "\n"; 20} 21 22test(new stdclass); 23 24?> 25--EXPECTF-- 26object(stdClass)#%d (0) { 27} 28NULL 29 30Warning: Undefined variable $y in %s on line %d 31Exception: Too few arguments to function {closure}(), 0 passed in %s on line %d and exactly 1 expected 32 33Fatal error: Uncaught TypeError: test(): Argument #1 ($a) must be of type Closure, stdClass given, called in %s:%d 34Stack trace: 35#0 %s(%d): test(Object(stdClass)) 36#1 {main} 37 thrown in %s on line %d 38