To determine whether the date is a weekend or a working day, it is mainly implemented through PHP's date function. 1. Use the date() function to combine the format parameters 'N' or 'w' to get the day of the week, where 'N' returns 1 (Monday) to 7 (Sunday), and if the value is greater than or equal to 6, it is the weekend; 2. Define differences for weekends in different regions, and you can use the custom weekend array to make matching judgments; 3. You can also use the DateTime class to implement the same logic, and the structure is clearer and easier to maintain. The above methods only deal with weekend judgments, and additional data is required for holidays.
Determining whether a date is a weekend or a working day is a common requirement in development, such as scheduling, calculating work order processing time, etc. It is actually not difficult to implement this in PHP. The key is how to use the built-in date function.
Use the date function to determine the day of the week
PHP's date() function can format output time information, where the two format parameters 'N' and 'w' can be used to determine the day of the week:
-
'N': Return to 1 (Monday) to 7 (Sunday) -
'w': Return to 0 (Sunday) to 6 (Monday)
You can tell whether it is a weekend based on these two values:
$date = '2025-04-05';
$weekDay = date('N', strtotime($date));
if ($weekDay >= 6) {
echo 'weekend';
} else {
echo 'working day';
} In the above code, N returns the ISO standard day of the week, 6 is Saturday, and 7 is Sunday. So as long as it is greater than or equal to 6, it is the weekend.
Handle weekend differences in different regions
Some countries or regions have weekends that are not Saturdays and Sundays, such as some countries in the Middle East have Fridays and Saturdays. At this time, we can't simply see if it is 6 or 7.
You can define an "weekend" array yourself and then do the comparison:
$date = '2025-04-04'; // Assume that this is Friday $weekDay = date('N', strtotime($date));
$weekendDays = [5, 6]; // Assume Friday and Saturday are weekends if (in_array($weekDay, $weekendDays)) {
echo 'weekend';
} else {
echo 'working day';
}This is more flexible and convenient for dynamic configuration according to different regions.
Use it more clearly with the DateTime class
In addition to date() , you can also use the object-oriented DateTime class, which is the same logic, but the structure may be clearer:
$date = new DateTime('2025-04-06');
$weekDay = (int)$date->format('N');
if ($weekDay >= 6) {
echo 'weekend';
} else {
echo 'working day';
}This writing method is easier to maintain in large projects, especially when it is processed in time zones.
Basically these methods. Which one to use depends on your habits? The key is to understand the difference between 'N' and 'w' and avoid misjudgment. Situations like holidays require additional data support, which cannot be done by the week alone.
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