3v4l.org

run code in 300+ PHP versions simultaneously
<?php $combined = array( 'A' => array( 'B' => array( 'C' => array(1, null), ), 'D' => array( 'K' => array(null, null), ) ), ); function _nullifyEmpty(array $array) { $nulls = 0; foreach ($array as $key => $value) { if (is_array($value)) { $array[$key] = $value = _nullifyEmpty($value); } if (null === $value) { ++$nulls; } } if ($nulls === count($array)) { return null; } return $array; } print_r(_nullifyEmpty($combined));
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [A] => Array ( [B] => Array ( [C] => Array ( [0] => 1 [1] => ) ) [D] => ) )
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/RcZcR on line 13
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/RcZcR on line 13
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
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/RcZcR on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/RcZcR on line 13
Process exited with code 255.
preferences:
202.31 ms | 401 KiB | 354 Q