How can PHP be used to check for overlapping opening hours in a more efficient and elegant way?

To efficiently and elegantly check for overlapping opening hours in PHP, we can compare the start and end times of each set of opening hours with the start and end times of the target opening hours. By using the `DateTime` class in PHP, we can easily perform these comparisons and determine if there is any overlap. 

function checkOverlap($openingHours1, $openingHours2) {
    $start1 = new DateTime($openingHours1['start']);
    $end1 = new DateTime($openingHours1['end']);
    $start2 = new DateTime($openingHours2['start']);
    $end2 = new DateTime($openingHours2['end']);

    if ($start1 < $end2 && $start2 < $end1) {
        return true; // Overlapping opening hours
    }

    return false; // No overlapping opening hours
}

// Example usage
$openingHours1 = ['start' => '09:00', 'end' => '17:00'];
$openingHours2 = ['start' => '10:00', 'end' => '18:00'];

if (checkOverlap($openingHours1, $openingHours2)) {
    echo 'Opening hours overlap!';
} else {
    echo 'Opening hours do not overlap.';
}

Keywords

PHP date time validation algorithm

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