PHP实现相同日期数组值求和：视图数大于0时合并同日期值

Got it, let's work through this problem directly. Based on your requirements, here's a practical PHP implementation that delivers exactly what you need:

Core Requirements Recap #

• If $view is less than 1: Return the original array without any changes
• If $view is greater than 0: Group items by their date key, sum the corresponding value values, then output the result in your specified indexed array format

Working Code Implementation #

// Replace this with your actual input array
$originalData = [
    ['date' => '09-04-2018', 'value' => 10],
    ['date' => '09-04-2018', 'value' => 20],
    ['date' => '10-04-2018', 'value' => 15],
    ['date' => '10-04-2018', 'value' => 17],
    ['date' => '11-04-2018', 'value' => 34],
    ['date' => '12-04-2018', 'value' => 20],
    ['date' => '12-04-2018', 'value' => 16],
    ['date' => '13-04-2018', 'value' => 39],
];

$view = 1; // Replace with your actual view value

$finalResult = [];

// Handle the two conditions
if ($view < 1) {
    // No processing needed—return original array
    $finalResult = $originalData;
} else {
    // Step 1: Group dates and sum their values
    $groupedSums = [];
    foreach ($originalData as $item) {
        $currentDate = $item['date'];
        // Initialize sum for new dates
        if (!isset($groupedSums[$currentDate])) {
            $groupedSums[$currentDate] = 0;
        }
        // Add to the total for this date
        $groupedSums[$currentDate] += $item['value'];
    }

    // Step 2: Convert grouped data to your desired format
    foreach ($groupedSums as $date => $totalValue) {
        $finalResult[] = [
            'date' => $date,
            'value' => $totalValue
        ];
    }
}

// Output the result (matches your requested structure)
print_r($finalResult);

How This Works #

• When $view < 1: We simply pass the original array through—no extra processing, keeping your raw data intact.
• When $view > 0:
  1. First, we use an associative array to track running totals for each date. This makes summing values quick and efficient.
  2. Then we convert that associative array back into the indexed array structure you specified, so the output matches your example exactly.

Example Output #

When $view = 1, you’ll get this output:

Array
(
    [0] => Array
        (
            [date] => 09-04-2018
            [value] => 30
        )

    [1] => Array
        (
            [date] => 10-04-2018
            [value] => 32
        )

    [2] => Array
        (
            [date] => 11-04-2018
            [value] => 34
        )

    [3] => Array
        (
            [date] => 12-04-2018
            [value] => 36
        )

    [4] => Array
        (
            [date] => 13-04-2018
            [value] => 39
        )

)

Just swap out the sample $originalData and $view variable with your actual data, and this code will work seamlessly.

内容的提问来源于stack exchange，提问作者Chris