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run code in 300+ PHP versions simultaneously
<?php $array = array( 0 => array (0 => null, 1=> 'something1'), 1 => array (0 => null, 1=> null, 2 => 'something2', 3 => array(0 => null, 1 => 'f')), 2 => null ); function filterNulls($array, &$list = []) { array_walk($array, function ($value, $key) use (&$list) { if (!is_array($value)) { if (!empty($value)) { $list[$key] = $value; } } else { $list[$key] = filterNulls($value); } }); return $list; } print_r(filterNulls($array));
Output for 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => Array ( [1] => something1 ) [1] => Array ( [2] => something2 [3] => Array ( [1] => f ) ) )
preferences:
132.1 ms | 408 KiB | 5 Q