数组针对某项的求和问题
已知数组a:
<br />array (<br /> 0 => <br /> array (<br /> 'stock_no' => 'SU13080800340',<br /> 'adress' => 'B',<br /> 'arr_time' => '2013-08-14 09:00:00',<br /> 'c_type' => 'P32E',<br /> 'cust_no' => '310F61VA5A',<br /> 'mount_total' => '1',<br /> 'total' => '16',<br /> 'c1_time' => '2013-08-10 15:00:00',<br /> 'packageno' => 'CVT121015001',<br /> ),<br /> 1 => <br /> array (<br /> 'stock_no' => 'SU13080800340',<br /> 'adress' => 'B',<br /> 'arr_time' => '2013-08-14 09:00:00',<br /> 'c_type' => 'P32E',<br /> 'cust_no' => '310F61VA5B',<br /> 'mount_total' => '2',<br /> 'total' => '32',<br /> 'c1_time' => '2013-08-10 15:00:00',<br /> 'packageno' => 'CVT121015002',<br /> ),<br /> 2 => <br /> array (<br /> 'stock_no' => 'SU13080800340',<br /> 'adress' => 'B',<br /> 'arr_time' => '2013-08-14 09:00:00',<br /> 'c_type' => 'P32E',<br /> 'cust_no' => '310F61VA5B',<br /> 'mount_total' => '2',<br /> 'total' => '32',<br /> 'c1_time' => '2013-08-10 15:00:00',<br /> 'packageno' => 'CVT121226001',<br /> ),<br />)<br />
如何分别求得数组中的项cust_no对应的packageno的结果以及stock_no对应mount_total和total项求和的结果?
假设cust_no为310F61VA5A时,对应的packageno为CVT121225001。
cust_no为310F61VA5B时,对应的packageno为CVT121225002,CVT121226001。
stock_no为SU13080800340时,求得的mount_total结果为3(1+2),total结果为48(16+32)。
如何达到这样的效果?