php - 按字段对对象数组进行排序

Question

我想按“日期”字段对以下选项卡进行排序并计算“临时”字段的总和:

0 =>     array (size=3)      'id_cra' => string '4586' (length=4)      'temps' => string '03:00:00' (length=8)      'date' => string '2013-06-03' (length=10) 
 1 =>     array (size=3)      'id_cra' => string '4587' (length=4)      'temps' => string '03:00:00' (length=8)      'date' => string '2013-06-06' (length=10) 
 2 =>     array (size=3)      'id_cra' => string '4588' (length=4)      'temps' => string '03:00:00' (length=8)      'date' => string '2013-06-05' (length=10)  
3 =>     array (size=3)      'id_cra' => string '4589' (length=4)      'temps' => string '03:00:00' (length=8)      'date' => string '2013-06-06' (length=10) 
 4 =>     array (size=3)      'id_cra' => string '4590' (length=4)      'temps' => string '03:00:00' (length=8)      'date' => string '2013-06-07' (length=10) 
 5 =>     array (size=3)      'id_cra' => string '4591' (length=4)      'temps' => string '02:00:00' (length=8)      'date' => string '2013-06-03' (length=10)  
6 =>     array (size=3)      'id_cra' => string '4592' (length=4)      'temps' => string '03:30:00' (length=8)      'date' => string '2013-06-03' (length=10)  

预期结果:

日期 = >“临时”字段的总和

2013-06-03 =>08:30:00
2013-06-06 =>06:00:00

等等

PS:抱歉问了一些对你来说可能很简单的问题，我已经在网上查过了(例如这里: Sort array of objects by object fields)但我不明白答案

Answer 1

我没有尝试，但它必须是这样的:

$arr = [your array data]; // your array which has to be sorted

usort($arr, 'sort_array');

function sort_array($a, $b) {

    $timeA = strtotime($a['date']);
    $timeB = strtotime($b['date']);

    if($timeA == $timeB) {
        return 0;
    }
    return $timeA < $timeB ? -1 : 1;
}

在对数组进行排序后，计算总和将是一个循环，您必须按日期“分组”并对“临时”求和