3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $corban_notice = false; if (!function_exists('cd')) { function cd($var) { global $corban_notice; if (!isset($var)) { if ($corban_notice) { echo 'Variable is not set'; $corban_notice = false; } else { echo 'Variable is not NULL'; } } } } function corban_error_handler($errno , $errstr, $errfile, $errline) { global $corban_notice; if ( version_compare(PHP_VERSION, '5.0.0', '>=') ) { $file = new SplFileObject($errfile); $file->seek($errline-1); $c = substr(trim($file->current()), 0, 3); if ($c=='cd(' || $c=='cd ') { $corban_notice = true; } } return false; } set_error_handler ('corban_error_handler', E_NOTICE); var_dump($a); $b = null; cd($a); cd($b);
based on MMsdY
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/YmAuJ on line 44 NULL Notice: Undefined variable: a in /in/YmAuJ on line 46 Variable is not setVariable is not NULL
Output for 5.0.0 - 5.0.5
Fatal error: Class 'SplFileObject' not found in /in/YmAuJ on line 30
Process exited with code 255.
Output for 4.3.0 - 4.4.9
Warning: Wrong parameter count for set_error_handler() in /in/YmAuJ on line 42 Notice: Undefined variable: a in /in/YmAuJ on line 44 NULL Notice: Undefined variable: a in /in/YmAuJ on line 46 Variable is not NULLVariable is not NULL