Php 按同一键的值的数组和

如何基于相同的“站点ID”和“TransactionType”对“金额”求和。 我的数据如下所示：

Array (
[0] => Array ( [SiteID] => 147 [Amount] => 500.00 [TransactionType] => Deposit )

[1] => Array ( [SiteID] => 147 [Amount] => 500.00 [TransactionType] => Redemption)

[2] => Array ( [SiteID] => 147 [Amount] => 1500.00[TransactionType] => Deposit )

[3] => Array ( [SiteID] => 147 [Amount] => 200.00 [TransactionType] => Reload )

[4] => Array ( [SiteID] => 150 [Amount] => 100.00 [TransactionType] => Deposit )

[5] => Array ( [SiteID] => 3   [Amount] => 500.00 [TransactionType] => Redemption )

[6] => Array ( [SiteID] => 150 [Amount] => 200.00 [TransactionType] => Redemption )

[7] => Array ( [SiteID] => 3   [Amount] => 500.00 [TransactionType] => Deposit )

[8] => Array ( [SiteID] => 3   [Amount] => 200.00 [TransactionType] => Deposit )

[9] => Array ( [SiteID] => 3   [Amount] => 200.00 [TransactionType] => Reload )

[10] => Array ( [SiteID] =>147 [Amount] => 500.00 [TransactionType] => Redemption ))
)

$transactions = array (
    array( 'SiteID' => 147, 'Amount' => '500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 147, 'Amount' => '500.00', 'TransactionType' => 'Redemption'),
    array( 'SiteID' => 147, 'Amount' => '1500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 147, 'Amount' => '200.00', 'TransactionType' => 'Reload' ),
    array( 'SiteID' => 150, 'Amount' => '100.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '500.00', 'TransactionType' => 'Redemption' ),
    array( 'SiteID' => 150, 'Amount' => '200.00', 'TransactionType' => 'Redemption' ),
    array( 'SiteID' => 3,   'Amount' => '500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '200.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '200.00', 'TransactionType' => 'Reload' ),
    array( 'SiteID' =>147, 'Amount' => '500.00', 'TransactionType' => 'Redemption' )
);

$totals = null;

foreach ($transactions as $t){
    $amount = (float) $t['Amount'];
    if (isset($totals[ $t['SiteID'] ][ $t['TransactionType'] ])){
        $totals[ $t['SiteID'] ][ $t['TransactionType'] ] += (float) $amount;
    } else {
        $totals[ $t['SiteID'] ][ $t['TransactionType'] ] = (float) $amount;
    }
}

print_r ($totals);

---

谢谢。请回复：）

请以后提供一个工作数组片段

array ([147]=>array([Deposit] => "total amount", [Reload]=> "total amount" [Redemption]=> "total amount"))

array ([150]=>array([Deposit] => "total amount", [Reload]=> "total amount" [Redemption]=> "total amount"))

array ([3]=>array  ([Deposit] => "total amount", [Reload]=> "total amount" [Redemption]=> "total amount"))

这将产生如下结果：

Array (
[0] => Array ( [SiteID] => 147 [Amount] => 500.00 [TransactionType] => Deposit )

[1] => Array ( [SiteID] => 147 [Amount] => 500.00 [TransactionType] => Redemption)

[2] => Array ( [SiteID] => 147 [Amount] => 1500.00[TransactionType] => Deposit )

[3] => Array ( [SiteID] => 147 [Amount] => 200.00 [TransactionType] => Reload )

[4] => Array ( [SiteID] => 150 [Amount] => 100.00 [TransactionType] => Deposit )

[5] => Array ( [SiteID] => 3   [Amount] => 500.00 [TransactionType] => Redemption )

[6] => Array ( [SiteID] => 150 [Amount] => 200.00 [TransactionType] => Redemption )

[7] => Array ( [SiteID] => 3   [Amount] => 500.00 [TransactionType] => Deposit )

[8] => Array ( [SiteID] => 3   [Amount] => 200.00 [TransactionType] => Deposit )

[9] => Array ( [SiteID] => 3   [Amount] => 200.00 [TransactionType] => Reload )

[10] => Array ( [SiteID] =>147 [Amount] => 500.00 [TransactionType] => Redemption ))
)

$transactions = array (
    array( 'SiteID' => 147, 'Amount' => '500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 147, 'Amount' => '500.00', 'TransactionType' => 'Redemption'),
    array( 'SiteID' => 147, 'Amount' => '1500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 147, 'Amount' => '200.00', 'TransactionType' => 'Reload' ),
    array( 'SiteID' => 150, 'Amount' => '100.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '500.00', 'TransactionType' => 'Redemption' ),
    array( 'SiteID' => 150, 'Amount' => '200.00', 'TransactionType' => 'Redemption' ),
    array( 'SiteID' => 3,   'Amount' => '500.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '200.00', 'TransactionType' => 'Deposit' ),
    array( 'SiteID' => 3,   'Amount' => '200.00', 'TransactionType' => 'Reload' ),
    array( 'SiteID' =>147, 'Amount' => '500.00', 'TransactionType' => 'Redemption' )
);

$totals = null;

foreach ($transactions as $t){
    $amount = (float) $t['Amount'];
    if (isset($totals[ $t['SiteID'] ][ $t['TransactionType'] ])){
        $totals[ $t['SiteID'] ][ $t['TransactionType'] ] += (float) $amount;
    } else {
        $totals[ $t['SiteID'] ][ $t['TransactionType'] ] = (float) $amount;
    }
}

print_r ($totals);

---

你是如何得到这些数据的？来自MySQL？是的，来自MySQL，但是函数不需要使用查询，它应该是一个数组。：）请提供一个工作数组。工作数组是什么意思？谢谢