Bug #54233 [Opn->Nab]: PHP Filter email doesn't work properly

Edit report at https://bugs.php.net/bug.php?id=54233&edit=1 ID: 54233 Updated by: cmb@php.net Reported by: flood at itnews-bg dot com Summary: PHP Filter email doesn't work properly -Status: Open +Status: Not a bug Type: Bug Package: Filter related Operating System: Slackware 13x86_64 PHP Version: 5.3.5 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. You shouldn't first sanitize and validate afterwards; that is likely to give unexpected results. Either sanitize or validate. See <http://3v4l.org/UXqdK>. Previous Comments: ------------------------------------------------------------------------ [2012-04-08 07:25:54] michael at squiloople dot com That is a valid email address. "?", "'" and "_", ".", as well as letters and numbers are acceptable characters in an email address's local-part. carsten_sttgt at gmx dot de, it uses RFC 5321 (more or less). ------------------------------------------------------------------------ [2011-03-12 12:14:02] carsten_sttgt at gmx dot de That's the correct behavior. FILTER_SANITIZE_EMAIL on: ?“?‰?“a‚¬?“?S?“a‚¬_?“a€??“a€¦?“??' this.is.a.testing@email.com results in: ???a??S?a_?a??a???'this.is.a.testing@email.com and that's a valid email address according to (at least) RFC822 (sorry, don't know which RFC PHP is exactly using for FILTER_VALIDATE_EMAIL. Should be documented) ------------------------------------------------------------------------ [2011-03-11 22:44:21] flood at itnews-bg dot com Hey, It seems the filter function is not working some times. You can see in the test script that the email is returned as a valid though it's not quite. ------------------------------------------------------------------------ [2011-03-11 22:43:36] flood at itnews-bg dot com Description: ------------ Hey, It seems the filter function is not working some times. You can see in the test script that the email is returned as a valid though it's not quite. Testing script: <?php $email = "?“?‰?“a‚¬?“?S?“a‚¬_?“a€??“a€¦?“??' this.is.a.testing@email.com"; var_dump(filter_var(filter_var($email,FILTER_SANITIZE_EMAIL), FILTER_VALIDATE_EMAIL)); ?> Test script: --------------- <?php $email = "?“?‰?“a‚¬?“?S?“a‚¬_?“a€??“a€¦?“??' this.is.a.testing@email.com"; var_dump(filter_var(filter_var($email,FILTER_SANITIZE_EMAIL), FILTER_VALIDATE_EMAIL)); ?> Expected result: ---------------- It should return a false boolean. This is not a valid email. Actual result: -------------- Returns an invalid email: ???a??S?a_?a??a???'this.is.a.testing@email.com ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=54233&edit=1