https://legacy.forums.gravityhelp.com/topic/validating-against-special-characters Gravity Support Forums Topic: Validating against special characters en-US Mon, 20 Apr 2026 22:17:12 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/validating-against-special-characters#post-10173 Tue, 21 Sep 2010 16:17:51 +0000 barthook 10173@https://legacy.forums.gravityhelp.com/ <p>I've tried all of the field types and none of them seem to do the special character validation I'm looking for. I'm comfortable with PHP and WordPress development with hooks and filters. </p> <p>Where in the gravity forms code base does validation take place? I'd like to mimic what you're doing there exactly with a different regular expression. </p> https://legacy.forums.gravityhelp.com/topic/validating-against-special-characters#post-10166 Tue, 21 Sep 2010 15:47:20 +0000 Carl Hancock 10166@https://legacy.forums.gravityhelp.com/ <p>What type of field are you using? Most of the fields have built in validation (numeric only allows numbers, etc.). In order to do custom validation on a field you would have to write custom code and use API hooks. How comfortable are you with PHP and WordPress development using hooks and filters? </p> https://legacy.forums.gravityhelp.com/topic/validating-against-special-characters#post-10162 Tue, 21 Sep 2010 15:28:24 +0000 barthook 10162@https://legacy.forums.gravityhelp.com/ <p>Hi there! I would like to prevent a user from entering special characters. I only want alphanumeric characters to pass validation. I've searched high and low through this forum and cannot seem to find any suggestions. Help please?! </p>