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php的多个dim数组中具有相同键的总值

php

php的多个dim数组中具有相同键的总值,php,Php,我有这样一个数组： $a = array( array('amount'=>10,'curr'=>'USD'), array('amount'=>20,'curr'=>'JPY'), array('amount'=>30,'curr'=>'BAT'), array('amount'=>50,'curr'=>'BAT'), array('amount'=>100,'curr'=>'USD')

我有这样一个数组：

$a = array(
    array('amount'=>10,'curr'=>'USD'),
    array('amount'=>20,'curr'=>'JPY'),
    array('amount'=>30,'curr'=>'BAT'),
    array('amount'=>50,'curr'=>'BAT'),
    array('amount'=>100,'curr'=>'USD')
    );

$total = array('BAT'=>80,
              'JPY'=>20,
              'USD'=>110
           )
我想将相同货币的所有金额相加，并按如下方式返回：

$a = array(
    array('amount'=>10,'curr'=>'USD'),
    array('amount'=>20,'curr'=>'JPY'),
    array('amount'=>30,'curr'=>'BAT'),
    array('amount'=>50,'curr'=>'BAT'),
    array('amount'=>100,'curr'=>'USD')
    );

$total = array('BAT'=>80,
              'JPY'=>20,
              'USD'=>110
           )