3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 1 => [ 1 => [ 'anna', 'alice' ], 2 => [ 'bob', 'bartold' ] ], 2 => [ 1 => [ 'carol' ], 2 => [ 'david' ] ] ]; $result = []; $prevKey = 0; array_walk_recursive($array, function ($value, $key, $prevKey) use (&$result) { $prevKey = $key; if (!is_array($value)) { echo "{$prevKey} <br /> -- {$value} <br />"; } }); var_dump($result);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed and exactly 3 expected in /in/kKmVZ:26 Stack trace: #0 [internal function]: {closure}('anna', 0) #1 /in/kKmVZ(26): array_walk_recursive(Array, Object(Closure)) #2 {main} thrown in /in/kKmVZ on line 26
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}(), 2 passed and exactly 3 expected in /in/kKmVZ:26 Stack trace: #0 [internal function]: {closure}('anna', 0) #1 /in/kKmVZ(31): array_walk_recursive(Array, Object(Closure)) #2 {main} thrown in /in/kKmVZ on line 26
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33
Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 0 <br /> -- anna <br /> Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 1 <br /> -- alice <br /> Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 0 <br /> -- bob <br /> Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 1 <br /> -- bartold <br /> Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 0 <br /> -- carol <br /> Warning: Missing argument 3 for {closure}() in /in/kKmVZ on line 26 0 <br /> -- david <br />array(0) { }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/kKmVZ on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/kKmVZ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/kKmVZ on line 3
Process exited with code 255.
preferences:
274.29 ms | 401 KiB | 422 Q