How can mktime be used to calculate Unix times with only the year and week number?

To calculate Unix times with only the year and week number, you can use the mktime function in PHP along with the date function to convert the week number into the corresponding day of the week. This way, you can create a Unix timestamp for the specific week in the given year. 

$year = 2022;
$week = 10;

// Calculate the Unix timestamp for the start of the week
$timestamp = mktime(0, 0, 0, 1, 1, $year) + ($week - 1) * 7 * 24 * 60 * 60;

// Convert the timestamp to a readable date format
$date = date('Y-m-d H:i:s', $timestamp);

echo $date;

Keywords

PHP mktime Unix time year week number

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