How to flatten array in PHP? -


i have array contains 4 arrays 1 value each.

array(4) {   [0]=>   array(1) {     ["email"]=>     string(19) "test01@testmail.com"   }   [1]=>   array(1) {     ["email"]=>     string(19) "test02@testmail.com"   }   [2]=>   array(1) {     ["email"]=>     string(19) "test03@testmail.com"   }   [3]=>   array(1) {     ["email"]=>     string(19) "test04@testmail.com"   } }

what best (=shortest, native php functions preferred) way flatten array contains email addresses values:

array(4) {   [0]=>   string(19) "test01@testmail.com"   [1]=>   string(19) "test02@testmail.com"   [2]=>   string(19) "test03@testmail.com"   [3]=>   string(19) "test04@testmail.com" }

in php 5.5 have array_column:

$plucked = array_column($yourarray, 'email');

otherwise, go array_map:

$plucked = array_map(function($item){ return $item['email'];}, $yourarray);

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