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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo { private $number = 42; public function bar() { var_dump($this->number); return __METHOD__; } } class Bar extends Foo { public function callme($callback) { echo call_user_func($callback); } } $callback = array('Foo', 'Bar'); var_dump(is_callable($callback)); $bar = new Bar(); $bar->callme($callback);
Output for 5.0.0 - 5.1.1, 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(true) int(42) Foo::bar
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.3 - 5.2.17
Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/Me4UW on line 20 bool(true) Strict Standards: Non-static method Foo::bar() cannot be called statically, assuming $this from compatible context Bar in /in/Me4UW on line 15 int(42) Foo::bar
Output for 5.1.2
Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/Me4UW on line 20 bool(true) Strict Standards: Non-static method Foo::Bar() cannot be called statically, assuming $this from compatible context Bar in /in/Me4UW on line 15 int(42) Foo::bar
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Me4UW on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Me4UW on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/Me4UW on line 5
Process exited with code 255.