3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = ['key1' => 5, 'key2' => 17]; $array = array_filter($array, function ($value, $key) { return !!preg_match('/^key\d$/', $key); });
based on 2va3C
Output for 7.1.0 - 7.3.0rc4
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/AR2HL:5 Stack trace: #0 [internal function]: {closure}(5) #1 /in/AR2HL(7): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/AR2HL on line 5
Process exited with code 255.
Output for 5.4.10 - 7.0.20
Warning: Missing argument 2 for {closure}() in /in/AR2HL on line 5 Notice: Undefined variable: key in /in/AR2HL on line 6 Warning: Missing argument 2 for {closure}() in /in/AR2HL on line 5 Notice: Undefined variable: key in /in/AR2HL on line 6
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/AR2HL on line 3
Process exited with code 255.