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PHP Date period array as single string

I am attempting to produce a single string with 2 values dates and cost

If a user selects a start date of 1/1/2025 and an end date of 3/1/2025 and the cost is 250 I am looking to build a string as follows.

"20250101":250,"20250102":250

I am using the following code.

$pricepern = 250;
    
$period = new DatePeriod(
    new DateTime($start_date),
    new DateInterval('P1D'),
    new DateTime($end_date));

foreach ($period as $key => $value) {
    $individualdays = '"'.$value->format('Ymd').'":'.$pricepern.',';
    echo $individualdays;   // It works in here     
}
    
echo $individualdays;   // It only provides the last value out here

Would appreciate any help in understanding how I produce a single string outside of the for each. I did try implode outside however it indicated that the value was not an array.

Cheers
zero

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2

Answers


  1. 0

    To build a single string containing all the date-cost pairs, you can concatenate each $individualdays string inside the loop and then remove the trailing comma. Here’s a way you can do it:

    $start_date = '2025-01-01';
$end_date = '2025-03-01';
$pricepern = 250;
    
$period = new DatePeriod(
    new DateTime($start_date),
    new DateInterval('P1D'),
    new DateTime($end_date)
);

$fullString = ''; // Initialize an empty string to hold the full result

foreach ($period as $key => $value) {
    $individualdays = '"' . $value->format('Ymd') . '":' . $pricepern . ',';
    $fullString .= $individualdays; // Concatenate each day string
}

// Remove the trailing comma
$fullString = rtrim($fullString, ',');

echo $fullString;

    This code will produce the desired output string with all the date-cost pairs concatenated together, and the trailing comma removed.

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  2. 0

    Put all the date:cost pairs in an array and use implode() to combine them with comma delimiters.

    $days_array = array_map(fn($value) => '"'.$value->format('Ymd').'":'.$pricepern, $period);
$individual_days = implode(',', $days_array);

echo $individual_days;
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