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<?php namespace Test; class A { public function b(callable $b) { $b(); } public function c() { echo 'd' . PHP_EOL; } } $foo = new A(); echo '$f->d() is callable: ' . is_callable(array($foo, 'c')) . PHP_EOL; $foo->b(array($foo, 'c'));
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
$f->d() is callable: 1 d
Output for 5.3.0 - 5.3.29
$f->d() is callable: 1 Catchable fatal error: Argument 1 passed to Test\A::b() must be an instance of Test\callable, array given, called in /in/tAf9r on line 20 and defined in /in/tAf9r on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/tAf9r on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/tAf9r on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/tAf9r on line 3
Process exited with code 255.