3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function a($b) { if($b===NULL) echo '$b is NULL<br/>'; if($b!==NULL) echo '$b isnt NULL<br/>'; var_dump($b); } a();
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught ArgumentCountError: Too few arguments to function a(), 0 passed in /in/trrrU on line 10 and exactly 1 expected in /in/trrrU:3 Stack trace: #0 /in/trrrU(10): a() #1 {main} thrown in /in/trrrU on line 3
Process exited with code 255.
Output for 5.4.0 - 7.0.20
Warning: Missing argument 1 for a(), called in /in/trrrU on line 10 and defined in /in/trrrU on line 3 Notice: Undefined variable: b in /in/trrrU on line 5 $b is NULL<br/> Notice: Undefined variable: b in /in/trrrU on line 6 Notice: Undefined variable: b in /in/trrrU on line 7 NULL