note 75452 added to function.checkdnsrr

With many email address validity functions listed here, it's worth mentioning that the boolean output of an email address validity function should never be treated as definitive with respect to displaying errors and restricting what the user of a web app can do. In more simple terms, if a user-supplied email address fails a validity check, don't tell the user the email address they entered is invalid and force them to enter something different. Use such email validity checks as guidelines only, word errors to state that the email address might be invalid, ask the user to check and always always give the user the option of bypassing the validity check - it's really infuriating to be told your email address is invalid when you know for sure this is not the case! ---- Server IP: 87.124.64.96 Probable Submitter: 62.56.60.159 ---- Manual Page -- http://www.php.net/manual/en/function.checkdnsrr.php Edit -- https://master.php.net/note/edit/75452 Del: integrated -- https://master.php.net/note/delete/75452/integrated Del: useless -- https://master.php.net/note/delete/75452/useless Del: bad code -- https://master.php.net/note/delete/75452/bad+code Del: spam -- https://master.php.net/note/delete/75452/spam Del: non-english -- https://master.php.net/note/delete/75452/non-english Del: in docs -- https://master.php.net/note/delete/75452/in+docs Del: other reasons-- https://master.php.net/note/delete/75452 Reject -- https://master.php.net/note/reject/75452 Search -- https://master.php.net/manage/user-notes.php