note 125182 added to function.array-column

Please note that if you use array_column to reset the index, when the index value is null, there will be different results in different PHP versions, examples <?php $array = [ [ 'name' =>'Bob', 'house' =>'big', ], [ 'name' =>'Alice', 'house' =>'small', ], [ 'name' =>'Jack', 'house' => null, ], ]; var_dump(array_column($array,null,'house')); On 5.6.30, 7.0.0, 7.2.0 (not limited to) get the following results array(3) { ["big"]=> array(2) { ["name"]=> string(3) "Bob" ["house"]=> string(3) "big" } ["small"]=> array(2) { ["name"]=> string(5) "Alice" ["house"]=> string(5) "small" } [0]=> array(2) { ["name"]=> string(4) "Jack" ["house"]=> NULL } } The new index, null will be converted to int, and can be incremented according to the previous index, that is, if Alice "house" is also null, then Alice's new index is "0", Jack's new index is "1" On 7.1.21, 7.2.18, 7.4.8 (not limited to) will get the following results array(3) { ["Big"]=> array(2) { ["name"]=> string(3) "Bob" ["house"]=> string(3) "Big" } ["small"]=> array(2) { ["name"]=> string(5) "Alice" ["house"]=> string(5) "small" } [""]=> array(2) { ["name"]=> string(4) "Jack" ["house"]=> NULL } } The new index null will be converted to an empty string ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.166.36 (proxied: 119.123.133.215) ---- Manual Page -- http://php.net/manual/en/function.array-column.php Edit -- https://master.php.net/note/edit/125182 Del: integrated -- https://master.php.net/note/delete/125182/integrated Del: useless -- https://master.php.net/note/delete/125182/useless Del: bad code -- https://master.php.net/note/delete/125182/bad+code Del: spam -- https://master.php.net/note/delete/125182/spam Del: non-english -- https://master.php.net/note/delete/125182/non-english Del: in docs -- https://master.php.net/note/delete/125182/in+docs Del: other reasons-- https://master.php.net/note/delete/125182 Reject -- https://master.php.net/note/reject/125182 Search -- https://master.php.net/manage/user-notes.php