RETURNS the day of week from a Julian Day Number, (JDN).
<?php
int|str jddayofweek ( int $julian_day , int $mode = CAL_DOW_DAYNO )
where,
$julian_day = A Julian Day Number, (JDN)
$mode = A calendar week modes
( SEE the below TABLE )
?>
| CONSTANT | VALUE | WHAT DOES | DEFAULT |
| CAL_DOW_DAYNO | 0 | The day of the week as integer, where 0 means Sunday and 6 means Saturday |
CAL_DOW_DAYNO |
| CAL_DOW_LONG | 1 | The English name of the day of the week English Gregorian |
|
| CAL_DOW_SHORT | 2 | The abbreviated English name of the day of the week English Gregorian |
|
| ed48 | |||
EXERCISE
<?php
$mi = 12;
$di = 25;
$yi = 33;
$calsi = [ 'CAL_GREGORIAN' => CAL_GREGORIAN,
'CAL_JULIAN' => CAL_JULIAN,
'CAL_JEWISH' => CAL_JEWISH,
'CAL_FRENCH' => CAL_FRENCH ];
$calsm = [ 'CAL_DOW_DAYNO' => CAL_DOW_DAYNO,
'CAL_DOW_LONG' => CAL_DOW_LONG,
'CAL_DOW_SHORT' => CAL_DOW_SHORT ];
foreach($calsi as $cli => $ci)
{
$c2jd = cal_to_jd($ci, $mi, $di, $yi);
echo 'JDN = ' . $c2jd . '<br>';
foreach($calsm as $clm => $cm)
{
echo $clm . '<br>';
$jdofwek = jddayofweek($c2jd, $cm);
echo $jdofwek . '<br>';
}
echo $cli . '<br>';
echo '<br><br>';
}
?>
EXERCISE
<?php
$mii = idate('m');
$dii = idate('d');
$yii = idate('Y');
$calsi = [ 'CAL_GREGORIAN' => CAL_GREGORIAN,
'CAL_JULIAN' => CAL_JULIAN,
'CAL_JEWISH' => CAL_JEWISH,
'CAL_FRENCH' => CAL_FRENCH ];
$calsm = [ 'CAL_DOW_DAYNO' => CAL_DOW_DAYNO,
'CAL_DOW_LONG' => CAL_DOW_LONG,
'CAL_DOW_SHORT' => CAL_DOW_SHORT ];
foreach($calsi as $cli => $ci)
{
$c2jd = cal_to_jd($ci, $mii, $dii, $yii);
echo 'JDN = ' . $c2jd . '<br>';
foreach($calsm as $clm => $cm)
{
echo $clm . '<br>';
$jdofwek = jddayofweek($c2jd, $cm);
echo $jdofwek . '<br>';
}
echo $cli . '<br>';
echo '<br><br>';
}
?>