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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo { public function bar() { return 'foo bar'; } } $callback = array('Foo', 'bar'); if (is_callable($callback)) { echo call_user_func($callback); }
Output for 7.0.0 - 7.1.0
Deprecated: Non-static method Foo::bar() should not be called statically in /in/rLeU2 on line 13 foo bar
Output for hhvm-3.12.0
foo bar
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.28
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method Foo::bar() should not be called statically in /in/rLeU2 on line 13 foo bar
Output for 5.1.2 - 5.2.17
Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/rLeU2 on line 12 Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/rLeU2 on line 13 Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/rLeU2 on line 13 foo bar
Output for 5.0.0 - 5.1.1
Strict Standards: Non-static method Foo::bar() cannot be called statically in /in/rLeU2 on line 13 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/rLeU2 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/rLeU2 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/rLeU2 on line 5
Process exited with code 255.