要求:
将二维数组$arr转换为以‘time'和‘type'为下标、‘data‘为值的二维数组;
原数组:
$arr = array( 0 => array( 'data' => 100, 'type' => 1, 'time' => '2018-01-26', ), 1 => array( 'data' => 200, 'type' => 2, 'time' => '2018-01-26', ), 2 => array( 'data' => 300, 'type' => 2, 'time' => '2018-01-27', ), 3 => array( 'data' => 400, 'type' => 3, 'time' => '2018-01-27', ), 4 => array( 'data' => 500, 'type' => 4, 'time' => '2018-01-28', ), );
转换:
foreach ($arr as $key => $value) { $change[$value['time']][$value['type']] = $value['data']; }
结果:
array(3) { ["2018-01-26"] => array(2) { [1] => int(100) [2] => int(200) } ["2018-01-27"] => array(2) { [2] => int(300) [3] => int(400) } ["2018-01-28"] => array(1) { [4] => int(500) } }
以上这篇PHP运用foreach神奇的转换数组(实例讲解)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持阿兔在线工具。