3v4l.org

run code in 300+ PHP versions simultaneously

@ 2015-09-28T13:17:43Z

<?php

$arr = array();
$a = [0,1,2,3,4,5];
$b = [0,1,2,3,4,5];
$c = [0,1,2,3,4,5];
$d = [0,1,2,3,4,5];
$e = [0,1,2,3,4,5];
$f = [0,1,2,3,4,5];
$g = [0,1,2,3,4,5];
$arr[] = $a;
$arr[] = $b;
$arr[] = $c;
$arr[0][2] = $d;
$arr[0][2][3] = $e;
$arr[2][1] = $f;
$arr[1] = $g;

print_r($arr);

function array_keys_recur($myArray, $MAXDEPTH = INF, $depth = 0, $arrayKeys = array()){
       if($depth < $MAXDEPTH){
            $depth++;
            $keys = array_keys($myArray);
            foreach($keys as $key){
                if(is_array($myArray[$key])){
                    $arrayKeys[$key] = array_keys_recursive($myArray[$key], $MAXDEPTH, $depth);
                }
            }
        }

        return $arrayKeys;
    }
   
   $keys = array_keys_recur($arr);
   
   print_r($keys);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => Array ( [0] => 0 [1] => 1 [2] => 2 [3] => Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 ) [4] => 4 [5] => 5 ) [3] => 3 [4] => 4 [5] => 5 ) [1] => Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 ) [2] => Array ( [0] => 0 [1] => Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 ) [2] => 2 [3] => 3 [4] => 4 [5] => 5 ) ) Fatal error: Uncaught Error: Call to undefined function array_keys_recursive() in /in/u2JPj:27 Stack trace: #0 /in/u2JPj(35): array_keys_recur(Array) #1 {main} thrown in /in/u2JPj on line 27
Process exited with code 255.

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

preferences:dark modelive preview

43.58 ms | 403 KiB | 8 Q