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mcal_week_of_year
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mcal_week_of_year

Name

mcal_week_of_year — Returns the week number of the given date

Synopsis

int mcal_week_of_year(day, month, year); int day: The day to check int month: The month to check int year: The year to check

Returns

The week of the year (1 to 53), or FALSE if the date is invalid

Description

ISO 8601 defines a standard for numbering weeks in a year. This is useful for applications that wish to display a week view, and industrial applications that deal with things like shift rotations. The first week of the year is always the first week (defined by the standard to be a block of 7 days starting on Monday) which contains a Thursday in the current year. This is a little bit nonintuitive; if a year starts on a Friday, then Friday the 1st through Sunday the 3rd are part of the last week of the previous year. A side effect of this is that the 4th of the year always falls during the first week of the year.

Version

PHP 4 since 4.0RC1

Example

Example 734. Finding the week number of a date

$year = 2002;
$month = MCAL_AUGUST;
$day = 9;

$weeknumber = mcal_week_of_year($day, $month, $year);
echo "The day is on week " . $weeknumber;

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