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php二維數(shù)組處理

JavaScript

哆啦的時光機 2019-04-09 20:25:38

$arr=array(array('amount'=>100,'date'=>'2014-03-29'),array('amount'=>120,'date'=>'2014-03-30'),array('amount'=>200,'date'=>'2014-03-31'));怎么轉(zhuǎn)化成以日期為準(zhǔn)，amount為之前amount的和？$arr=array(array('amount'=>100,'date'=>'2014-03-29'),array('amount'=>220,'date'=>'2014-03-30'),array('amount'=>420,'date'=>'2014-03-31'));

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鴻蒙傳說

TA貢獻1865條經(jīng)驗獲得超7個贊

functionsd($a,$b){if($a['date']==$b['date'])return0;return$a['date']>$b['date']?1:-1;usort($arr,'sd');$amount=0;foreach($arras&$item){$amount+=$item['amount'];$item['amount']=$amount;}