How Can I Reliably Determine if a Given Date is a Weekend in PHP?

How to Determine Weekend Status of a Date in PHP

This question arises when working with functions that aim to identify if a given date falls on a weekend. One such function, provided by the user, returns only false values despite seemingly valid parameters.

The Issue

The provided function, isweekend(), performs the following steps:

1. Converts the input string into a timestamp using strtotime.
2. Formats the timestamp into the day of the week name, such as Saturday or Sunday using date("l").
3. Compares the formatted string with either "Saturday" or "Sunday" to determine if it's a weekend.

However, it returns "false" regardless of the input date.

The Solution

There are two alternative solutions to accurately determine the weekend status of a date in PHP:

For PHP >= 5.1:

function isWeekend($date) {
    return (date('N', strtotime($date)) >= 6);
}

This solution uses date('N') to return the day of the week as an integer, where 1 represents Monday and 7 represents Sunday. It then checks if this integer is greater than or equal to 6, indicating a weekend.

For PHP < 5.1:

function isWeekend($date) {
    $weekDay = date('w', strtotime($date));
    return ($weekDay == 0 || $weekDay == 6);
}

This solution uses date('w') to return the day of the week as an integer, where 0 represents Sunday and 6 represents Saturday. It then checks if the integer is either 0 or 6 to determine if it's a weekend.

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