Detailed explanation of the steps to convert an array using foreach in PHP

This time I will bring you PHP usageforeachconversionarraydetailed steps, what are theprecautionsfor using foreach in PHP to convert arrays, the following is a practical case , let’s take a look.

Requirements:

Converttwo-dimensional array$arr to 'time' and 'type' Standard, 'data' is a two-dimensional array of values;

Original array:

$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', ), );

Conversion:

foreach ($arr as $key => $value) { $change[$value['time']][$value['type']] = $value['data']; }

Result:

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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