在PHP中过滤多维数组

Question

I have an array in PHP like this:

Array(
    0 => Array(
        'NDC_Date'     => '2017-02-26',
        'NDC_Item'     => 'Night',
        'NDC_Rate'     => 108.00,
        'NDC_Quantity' => 1,
    ),
    1 => Array(
        'NDC_Date'     => '2017-02-27',
        'NDC_Item'     => 'Night',
        'NDC_Rate'     => 108.00,
        'NDC_Quantity' => 1,
    ),
    2 => Array(
        'NDC_Date'     => '2017-02-28',
        'NDC_Item'     => 'Night',
        'NDC_Rate'     => 118.00,
        'NDC_Quantity' => 1,
    ),
    3 => Array(
        'NDC_Date'     => '2017-03-01',
        'NDC_Item'     => 'Night',
        'NDC_Rate'     => 108.00,
        'NDC_Quantity' => 1,
    ),
    4 => Array(
        'NDC_Date'     => '2017-01-01',
        'NDC_Item'     => 'Breakfast',
        'NDC_Rate'     => 12.00,
        'NDC_Quantity' => 2,
    ),
    5 => Array(
        'NDC_Date'     => '2017-01-01',
        'NDC_Item'     => 'Extra bed',
        'NDC_Rate'     => 0.00,
        'NDC_Quantity' => 1,
    ),
    6 => Array(
        'NDC_Date'     => '2017-01-02',
        'NDC_Item'     => 'Breakfast',
        'NDC_Rate'     => 12.00,
        'NDC_Quantity' => 2,
    ),
    7 => Array(
        'NDC_Date'     => '2017-01-02',
        'NDC_Item'     => 'Extra bed',
        'NDC_Rate'     => 0.00,
        'NDC_Quantity' => 1,
    ),
    8 => Array(
        'NDC_Date'     => '2017-01-03',
        'NDC_Item'     => 'Breakfast',
        'NDC_Rate'     => 12.00,
        'NDC_Quantity' => 2,
    ),
    9 => Array(
        'NDC_Date'     => '2017-01-03',
        'NDC_Item'     => 'Extra bed',
        'NDC_Rate'     => 0.00,
        'NDC_Quantity' => 1,
    ),
);

I need to merge some of the entries only if:

• The dates are consecutive .

• The items and item rates are the same.

---

Desired output:

Array (
    [0] => Array (
        [NDC_Date] => 2017-02-26, 2017-02-27
        [NDC_Item] => Night
        [NDC_Rate] => 108.00
        [NDC_Quantity] => 1
    )
    [1] => Array (
        [NDC_Date] => 2017-02-28
        [NDC_Item] => Night
        [NDC_Rate] => 118.00
        [NDC_Quantity] => 1
    )
    [2] => Array (
        [NDC_Date] => 2017-03-01
        [NDC_Item] => Night
        [NDC_Rate] => 108.00
        [NDC_Quantity] => 1
    )
    [3] => Array (
        [NDC_Date] => 2017-01-01, 2017-01-02, 2017-01-03
        [NDC_Item] => Breakfast
        [NDC_Rate] => 12.00
        [NDC_Quantity] => 2
    )
    [4] => Array (
        [NDC_Date] => 2017-01-01, 2017-01-02, 2017-01-03
        [NDC_Item] => Extra bed
        [NDC_Rate] => 0.00
        [NDC_Quantity] => 1
    )
)

---

What I have actually is the piece of code to merge the dates when the item and the item-price are the same:

$result = [];
foreach ($billingDatas as $item) {
    $k = $item['NDC_Item'];
    if (!isset($result[$k])) {
        $result[$k] = $item;
    } elseif (($i = $result[$k]) 
            && $item['NDC_Rate'] == $i['NDC_Rate'] 
            && $item['NDC_Quantity'] == $i['NDC_Quantity']) {
        $result[$k]['NDC_Date'] .= ', '. $item['NDC_Date'];
    } else {
        $result[$k. time()] = $item;
    }
}
$result = array_values($result);

And another one to check if the dates are consecutive or not:

$dates = "2017-02-26, 2017-02-27, 2017-03-01";
$dates = explode(',', $dates);

$conseq = array(); 
$ii = 0;
$max = count($dates);

for($i = 0; $i < count($dates); $i++) {
    $conseq[$ii][] = date('Y-m-d',strtotime($dates[$i]));

    if($i + 1 < $max) {
        $dif = strtotime($dates[$i + 1]) - strtotime($dates[$i]);
        if($dif >= 90000) {
            $ii++;
        }   
    }
}

print_r($conseq);

But how can I merge the two codes to get the new array ?

Thanks.

Answer 1

Don't use the second approach of dissecting each part, what you do is just to build on what you already have in your initial foreach loop.

First criteria in your current loop is to check the rate and then quantity. The next step is to just check the date .

To do that, get the current batch grouped array, explode it and get the last date. And check the current iteration date and check if that date is the consecutive day.

Idea:

$result = [];
foreach ($billingDatas as $item) {
    $k = $item['NDC_Item'];

    if (!isset($result[$k])) {
        $result[$k] = $item;
    } elseif (
        ($i = $result[$k]) && 
        $item['NDC_Rate'] === $i['NDC_Rate'] && 
        $item['NDC_Quantity'] === $i['NDC_Quantity'] 
    ) {
        // additional date check
        $current_dates = explode(', ', $result[$k]['NDC_Date']); // get the comma delimited dates and explode
        $last_date = end($current_dates); // get the last date
        // then check if the current iteration date is the next day
        if(date('Y-m-d', strtotime("{$last_date} +1 day")) === $item['NDC_Date']) {
            $result[$k]['NDC_Date'] .= ', '. $item['NDC_Date'];
        } else {
            $result[$k. microtime()] = $item;
        }
        // rest is self-explanatory

    } else {
        $result[$k. microtime()] = $item;
    }
}
$result = array_values($result);