How to retrieve the interval seconds between two date and time values using PHP?

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You can use the DateTime class in PHP to retrieve the interval seconds between two date and time values. Here’s an example:

// Set the start date and time
$start_date = new DateTime('2021-08-05 08:30:00');

// Set the end date and time
$end_date = new DateTime('2021-08-05 09:30:30');

// Get the interval seconds
$interval = $end_date->getTimestamp() - $start_date->getTimestamp();
echo $interval;

In this example, we set the start date and time to August 5th, 2021 at 8:30:00 AM and the end date and time to August 5th, 2021 at 9:30:30 AM. We then calculate the interval seconds by subtracting the start timestamp from the end timestamp using the getTimestamp() method. Finally, we output the interval seconds, which in this case is 3630 (i.e., one hour, 30 seconds).