How can you efficiently check for changes in dates within a loop to determine when to display a new date as a header in PHP?

To efficiently check for changes in dates within a loop to determine when to display a new date as a header in PHP, you can keep track of the previous date and compare it with the current date in each iteration of the loop. If the current date is different from the previous date, you can display it as a new header. This approach ensures that a new date header is only displayed when the date changes. 

$dates = ['2022-01-01', '2022-01-01', '2022-01-02', '2022-01-03', '2022-01-03'];

$prevDate = null;
foreach ($dates as $date) {
    if ($date != $prevDate) {
        echo "<h2>$date</h2>";
    }
    
    // Display other content for each date here
    
    $prevDate = $date;
}

Keywords

date comparison loop iteration conditional statement header display PHP programming

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