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PHP运用foreach神奇的转换数组(实例讲解)

栏目:PHP基础 来源: 微信小程序开发网 阅读: 2018-02-28

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) } }

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