3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test() { var_dump(debug_backtrace()); } class A { public function test() { $func = function() { call_user_func('self::callTarget'); }; $func(); } public static function callTarget() { echo 'hello'; } } class B extends A {} $a = new B; $a->test();
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Use of "self" in callables is deprecated in /in/cAPP4 on line 10 hello
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
hello
Output for 5.3.0 - 5.3.29
Warning: call_user_func() expects parameter 1 to be a valid callback, cannot access self:: when no class scope is active in /in/cAPP4 on line 10
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/cAPP4 on line 9
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/cAPP4 on line 9
Process exited with code 255.
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/cAPP4 on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/cAPP4 on line 8
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/cAPP4 on line 8
Process exited with code 255.
preferences:
193.42 ms | 401 KiB | 329 Q