3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = [ "k0"=>"v0", "k1"=>"v1", "k2"=>"v2", "k3"=>"v3", "k4"=>"v4", ]; $result_1 = []; while (key($data)) { $result_1[key($data)] = current($data); next($data); } print_r($result_1); //Then perform the same operation in a function supplying the same array $data as argument //(mind that the internal pointer of $data is at the end): traverse($data); function traverse($arr){ $result_2 = []; while (key($arr)) { $result_2[key($arr)] = current($arr); next($arr); } print_r($result_2); }
Output for 7.0.33, 7.1.0 - 7.1.30, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [k0] => v0 [k1] => v1 [k2] => v2 [k3] => v3 [k4] => v4 ) Array ( )
Output for 5.6.38 - 5.6.40
Array ( [k0] => v0 [k1] => v1 [k2] => v2 [k3] => v3 [k4] => v4 ) Array ( [k0] => v0 [k1] => v1 [k2] => v2 [k3] => v3 [k4] => v4 )
preferences:
109.66 ms | 1582 KiB | 4 Q