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

Checking if a Date is a Weekend in PHP

The provided PHP function, isweekend(), appears to always return false due to an oversight. Here's a corrected version:

function isWeekend($date) {
    $dayOfWeek = strtolower(date("l", strtotime($date)));
    if ($dayOfWeek == "saturday" || $dayOfWeek == "sunday") {
        return true;
    } else {
        return false;
    }
}

For PHP versions 5.1 and above, a more concise solution exists:

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

In both cases, the function checks the weekday and returns true if it falls on a Saturday or Sunday (Saturday has a value of 6 and Sunday 7 when using the date('N') function).

To use the corrected isWeekend() function:

$isThisAWeekend = isWeekend('2011-01-01');

This will correctly indicate whether the input date is a weekend.

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