JDDayOfWeek – Return Day of Week from Julian Day Number (PHP)
The JDDayOfWeek PHP function returns the day of the week for a given Julian day number, offering numeric or English string results based on an optional mode parameter, making it useful for date calculations in backend development.
The
mixed jddayofweek (int $julianday[, int $mode = CAL_DOW_DAYNO])function returns the day of the week for a given Julian day number. Depending on the $mode parameter, the result can be an integer (0=Sunday … 6=Saturday) or a string representation in English, either full or abbreviated.
Parameters
$julianday : a Julian day number.
$mode (optional): 0 (default) returns numeric day, 1 returns full English name, 2 returns abbreviated English name.
Return value
Either an integer or a string representing the day of the week, according to the selected mode.
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