3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public static function b() { } public static function c() { } } class B { public function __invoke() { } } function a (callable $a = array('A', 'b')) { } a('a'); a(array('A', 'b')); a(array(new A, 'c')); a(new B); a(function(){});
Output for 5.4.0 - 5.4.21
Fatal error: Default value for parameters with callable type hint can only be NULL in /in/Sml0W on line 19
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Fatal error: Default value for parameters with a class type hint can only be NULL in /in/Sml0W on line 19
Process exited with code 255.
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172.29 ms | 1395 KiB | 57 Q