如何使用PHP对基于Key的数组的值求和

Question

for ($row = 0; $row < 25; $row++) {
    $bQuery = 'Select date, billed from {$tableArray[$row][1]}';
    $bProvider = new CSqlDataProvider($bQuery, array('pagination'=>false));
    $Arr2 = $bProvider->getData();
    // merging array to get all loop records in single array
    $array_2 = array_merge($array_2, $Arr2);
}

Then print_r $array_2 output is:

Array
(
    [0] => Array
        (
            [date] => 2016-11-00
            [billed] => 100
        )
    [1] => Array
        (
            [date] => 2016-12-00
            [billed] => 400
        )
    [2] => Array
        (
            [date] => 2016-11-00
            [billed] => 200
        )
     // so on
)

I want to sum billed where date is same . So here is my code which works for it.

$result = array();
foreach ($array_2 as $data) {
    @$result[$data['date']] += $data['billed'];
}

print_r($result);

$newresultGraph = array();
foreach ($result as $date => $billed) {
    $newresultGraph[] = array('date' => $date, 'billed' => $billed);
}

print_r($newresultGraph);

The print_r($result) in above codes returns me data like this below, It has already summed the values for the same date.

Array
(
    [2016-11-00] => 300
    [2016-12-00] => 400
)

Then in my above code after another foreach loop, Im making my data like before in array. when i print_r($newresultGraph) , My data is like this.

Array
(
    [0] => Array
        (
            [date] => 2016-11-00
            [billed] => 300
        )

    [1] => Array
        (
            [date] => 2016-12-00
            [billed] => 400
        )

)

This is working perfectly for me.. because my query was this.

Select date, billed from table'

I was getting only date , billed from table but now i have another field so my query is like this..

Select 
date, 
billed, 
((billed * rate) * (myValue) / 100) as my_rev,
((billed * rate) * (opValue) / 100) as op_rev,
From table

So i have two new values which are my_rev and op_rev

Then print_r $array_2 output is:

Array
(
    [0] => Array
        (
            [date] => 2016-11-00
            [billed] => 100
            [my_rev] => 30
            [op_rev] => 70
        )
    [1] => Array
        (
            [date] => 2016-12-00
            [billed] => 400
            [my_rev] => 150
            [op_rev] => 250
        )
    [2] => Array
        (
            [date] => 2016-11-00
            [billed] => 200
            [my_rev] => 50
            [op_rev] => 150
        )
     // so on
)

which is correct,

I want to sum the values of all billed, my_rev, op_rev for a date.. I don't want to sum billed+my_rev+op_rev..

I want my array to be like this below: It should sum all the values of billed into billed, similarly for my_rev and op_rev.

Just like below example.

Array
(
    [0] => Array
        (
            [date] => 2016-11-00
            [billed] => 300
            [my_rev] => 80
            [op_rev] => 220
        )
[1] => Array
    (
        [date] => 2016-12-00
        [billed] => 400
        [my_rev] => 150
        [op_rev] => 250
    )

)

My above code is turning my print_r($result) into like this:

Array
(
    [2016-11-00] => 600
    [2016-12-00] => 800
)

What should i do? any other suggestion?

Answer 1

This code does it :

$tmp_array = array();
foreach ($array as $val) {
    if (array_key_exists($val['date'], $tmp_array)) {
        $tmp_array[$val['date']]['billed'] += $val['billed'];
        $tmp_array[$val['date']]['my_rev'] += $val['my_rev'];
        $tmp_array[$val['date']]['op_rev'] += $val['op_rev'];
    } else {
        $tmp_array[$val['date']]['date'] = $val['date'];
        $tmp_array[$val['date']]['billed'] = $val['billed'];
        $tmp_array[$val['date']]['my_rev'] = $val['my_rev'];
        $tmp_array[$val['date']]['op_rev'] = $val['op_rev'];
    }
}

$result = array_values($tmp_array);

OUTPUT :

Array
(
    [0] => Array
        (
            [date] => 2016-11-00
            [billed] => 300
            [my_rev] => 80
            [op_rev] => 220
        )
    [1] => Array
        (
            [date] => 2016-12-00
            [billed] => 400
            [my_rev] => 150
            [op_rev] => 250
        )
    )
)

$tmp_array as the dates as keys in order to group the data, the last replaces these keys with succesive indexes. If you prefer to keep dates as keys - it's more optimized - or doesn't care, just call $tmp_array $result and delete the last line.

Answer 2

Just change your 2nd last foreach like this and then print the result array and see it will sum values with their keys.

$result = array();
foreach ($array_2 as $data) {
    @$result[$data['date']]['billed'] += $data['billed'];
    @$result[$data['date']]['my_rev'] += $data['my_rev'];
    @$result[$data['date']]['op_rev'] += $data['op_rev'];
}

You can change your last foreach accordingly if you need it.

Result with your values:

Input:

Array
(
[0] => Array
    (
        [date] => 2016-11-00
        [billed] => 100
        [my_rev] => 30
        [op_rev] => 70
    )

[1] => Array
    (
        [date] => 2016-12-00
        [billed] => 400
        [my_rev] => 150
        [op_rev] => 250
    )

[2] => Array
    (
        [date] => 2016-11-00
        [billed] => 200
        [my_rev] => 50
        [op_rev] => 150
    )

)

Result:

Array
(
[2016-11-00] => Array
    (
        [billed] => 300
        [my_rev] => 80
        [op_rev] => 220
    )

[2016-12-00] => Array
    (
        [billed] => 400
        [my_rev] => 150
        [op_rev] => 250
    )
)

Answer 3

There are two options:

• calculate sums in PHP
• calculate sums in SQL

Calculate sums in PHP

$sql = <<<SQL
SELECT
    date, 
    billed, 
    billed * rate * myValue / 100 AS my_rev,
    billed * rate * opValue / 100 AS op_rev
FROM
    table
SQL;

$provider = new CSqlDataProvider($sql, array(
    'pagination' => false,
));

$rows = $provider->getData();

$data = array();

foreach ($rows as $row) {
    $date = $row['date'];

    // initialize
    if (!array_key_exists($date, $data)) {
        $data[$date] = array(
            'date' => $date,
            'billed' => $row['billed',
            'my_rev' => $row['my_rev'],
            'op_rev' => $row['op_rev',
        );

        continue;
    }

    $data[$date]['billed'] += $row['billed'];
    $data[$date]['my_rev'] += $row['my_rev'];
    $data[$date]['op_rev'] += $row['op_rev'];
}

// sort by key, that is, sort by date
ksort($data);

// remove keys
$data = array_values($data);

var_dump($data);

Calculate sums in SQL

$sql = <<<SQL
SELECT
    date, 
    SUM(billed), 
    SUM(billed * rate * myValue / 100) AS my_rev,
    SUM(billed * rate * opValue / 100) AS op_rev
FROM
    table
GROUP BY
    date
ORDER BY
    date ASC
SQL;

$provider = new CSqlDataProvider($sql, array(
    'pagination' => false,
));

$rows = $provider->getData();

var_dump($rows);

You decide for yourself which of these solutions you prefer. However, the latter requires less PHP code and after all, the database server can do some work, too, right?