3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(){ echo 'foo 1'; } if (is_callable('foo')){ runkit_function_redefine('foo','','echo "foo 2";'); }
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function runkit_function_redefine() in /in/rSGkV:9 Stack trace: #0 {main} thrown in /in/rSGkV on line 9
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Uncaught Error: Call to undefined function runkit_function_redefine() in /in/rSGkV:9 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.0.0 - 5.6.28, hhvm-3.10.0
Fatal error: Call to undefined function runkit_function_redefine() in /in/rSGkV on line 9
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: runkit_function_redefine() in /in/rSGkV on line 9
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: runkit_function_redefine() in /in/rSGkV on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: runkit_function_redefine() in /in/rSGkV on line 9