我想对子数组值求和并按子数组值分组,但出现错误:“未定义索引:EEReg”。
数组如下。
,当前代码为;
$total_balances = array();
foreach ($balances as $balance) {
foreach ($balance as $key => $value) {
if ($key == 'MemberNumber' || $key == 'Portfolio') {
continue;
} else {
$total_balances[$balance['Portfolio']][$key] += $value;
}
}
}
我希望结果是
$total_balances = [
"Aggressive" => [
"EEReg" => "Sum of EEReg where Portfolio is Aggressive",
"ERReg" => "Sum of ERReg where Portfolio is Aggressive",
],
"Moderate" => [
"EEReg" => "Sum of EEReg where Portfolio is Moderate",
"ERReg" => "Sum of ERReg where Portfolio is Moderate",
]
]
答案 0 :(得分:0)
您只需要使用一次foreach,并且还需要在使用$ total_balance数组之前定义它们。请参见下面的代码
$total_balances = array();
foreach ($balances as $balance) {
if( !isset( $total_balances[$balance['Portfolio']] )) {
$total_balances[$balance['Portfolio']] = array('EEREG' => 0, 'ERREG' => 0);
}
$total_balances[$balance['Portfolio']]['EEREG'] += $balance['EEREG'];
$total_balances[$balance['Portfolio']]['ERREG'] += $balance['ERREG'];
}