note 129409 added to datetime.modify

You have to be a bit careful with variables here. If for example you want to add a variable amount of minutes you might use ->modify("+$min"). This will not work out if $min is a negative number, because modify will see the "+" and ignore the "-". If $min` equals -10, modify in this example will add ten minutes, not subtract! What is happening is if the modify string has two operations, the first will be obeyed and later ones will be ignored. So "+-10 minutes" will add ten minutes, even though you might expect it to add the negative number. Similarly "--10 minutes" will subtract ten minutes, despite the apparent logic of subtracting a negative number. ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.13.131 (proxied: 207.141.165.163) ---- Manual Page -- https://php.net/manual/en/datetime.modify.php Edit -- https://main.php.net/note/edit/129409 Del: integrated -- https://main.php.net/note/delete/129409/integrated Del: useless -- https://main.php.net/note/delete/129409/useless Del: bad code -- https://main.php.net/note/delete/129409/bad+code Del: spam -- https://main.php.net/note/delete/129409/spam Del: non-english -- https://main.php.net/note/delete/129409/non-english Del: in docs -- https://main.php.net/note/delete/129409/in+docs Del: other reasons-- https://main.php.net/note/delete/129409 Reject -- https://main.php.net/note/reject/129409 Search -- https://main.php.net/manage/user-notes.php