3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a { return get_called_class(); } class A { protected $a; public function foo() { $f = function() { echo a(); }; $f(); } } $a = new A; $a->foo();
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '{', expecting '(' in /in/GtkWD on line 2
Process exited with code 255.

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