php - How to create today, tomorrow and yesterday with MySQL -


first of have searched forum getting answer problem. creating weekly schedule php & mysql , problem can not figure out how setup case statement when actual day sunday , need set monday tomorrow. here simple mysql table week 

fields: dayid(int,primary,auto-increment),day(varchar(25)) data: (1,'monday'),(2,'tuesday'),(3,'wednesday'),(4,'thursday'),       (5,'friday'),(6,'saturday'),(7,'sunday');

here php code:

$today = date("n"); $query = "select *,case when dayid = '$today' 'today'                         when dayid = '$today' + 1 'tomorrow'                         when dayid = '$today' - 1 'yesterday'                         else day end days week "; $results = mysqli_query($link, $query); while ($r = mysqli_fetch_array($results)) { echo '<p>'.$r['days'].'</p>'; }

like wrote before can not figure out how set when $today = 7 (sunday) monday tomorrow , other way around when it´s monday says yesterday instead of sunday. can me solve this.

thank in advance!

you need use if wrap around @ end of week:

case dayid     when $today today     when if($today = 7, 1, $today + 1) 'tomorrow'     when if($today = 1, 7, $today - 1) 'yesterday'     else day end days

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