Totalarray
(
[0] => Array
(
[city] => NewYork
[cash] => 1000
)
[1] => Array
(
[city] => Philadelphia
[cash] => 2300
)
[2] => Array
(
[city] => NewYork
[cash] => 2000
)
)
我想总结具有相同值[city]的子数组的值[cash]并获得如下数组:
Totalarray
(
[0] => Array
(
[city] => NewYork
[cash] => 3000
)
[1] => Array
(
[city] => Philadelphia
[cash] => 2300
)
)
我该怎么做?
解决方法:
试试以下代码:
<?PHP
$arr = array(
array('city' => 'NewYork', 'cash' => '1000'),
array('city' => 'Philadelphia', 'cash' => '2300'),
array('city' => 'NewYork', 'cash' => '2000'),
);
$newarray = array();
foreach($arr as $ar)
{
foreach($ar as $k => $v)
{
if(array_key_exists($v, $newarray))
$newarray[$v]['cash'] = $newarray[$v]['cash'] + $ar['cash'];
else if($k == 'city')
$newarray[$v] = $ar;
}
}
print_r($newarray);
输出:
Array
(
[NewYork] => Array
(
[city] => NewYork
[cash] => 3000
)
[Philadelphia] => Array
(
[city] => Philadelphia
[cash] => 2300
)
)