Is it recommended to use built-in PHP functions or create custom functions for date comparisons?

When comparing dates in PHP, it is generally recommended to use built-in PHP functions like `strtotime()` and `date_diff()` for accurate and efficient date comparisons. These functions handle various date formats and timezones, making the process simpler and less error-prone. Creating custom functions for date comparisons can be complex and may not cover all edge cases. 

$date1 = '2022-01-01';
$date2 = '2022-01-15';

$timestamp1 = strtotime($date1);
$timestamp2 = strtotime($date2);

$interval = date_diff(date_create($date1), date_create($date2));

if ($timestamp1 < $timestamp2) {
    echo "$date1 is before $date2";
} elseif ($timestamp1 > $timestamp2) {
    echo "$date1 is after $date2";
} else {
    echo "$date1 is equal to $date2";
}

echo "The difference in days is: " . $interval->format('%a days');

Keywords

built-in functions custom functions date comparisons PHP recommendation

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