3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1=>'a', 2=>'b']; var_dump(array_map(function($k, $v) { return ['val' => $v, 'label' => $k]; }, $a));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/s4FWI:5 Stack trace: #0 [internal function]: {closure}('a') #1 /in/s4FWI(5): array_map(Object(Closure), Array) #2 {main} thrown in /in/s4FWI on line 5
Process exited with code 255.
Output for 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
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/s4FWI:5 Stack trace: #0 [internal function]: {closure}('a') #1 /in/s4FWI(8): array_map(Object(Closure), Array) #2 {main} thrown in /in/s4FWI on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20
Warning: Missing argument 2 for {closure}() in /in/s4FWI on line 5 Notice: Undefined variable: v in /in/s4FWI on line 7 Warning: Missing argument 2 for {closure}() in /in/s4FWI on line 5 Notice: Undefined variable: v in /in/s4FWI on line 7 array(2) { [1]=> array(2) { ["val"]=> NULL ["label"]=> string(1) "a" } [2]=> array(2) { ["val"]=> NULL ["label"]=> string(1) "b" } }
preferences:
212.4 ms | 403 KiB | 244 Q