From 7fa8f7cb4cde2753481acbd884b503e583bfa04d Mon Sep 17 00:00:00 2001
From: Adam Leadoux <adam@leadoux.com.au>
Date: Thu, 26 Nov 2020 07:58:02 +1100
Subject: [PATCH] Fixing a bug that will allow a value of '0' to bypass
 validation.

---
 gravityforms-regex-validation.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gravityforms-regex-validation.php b/gravityforms-regex-validation.php
index 8904493..de64d8f 100755
--- a/gravityforms-regex-validation.php
+++ b/gravityforms-regex-validation.php
@@ -82,7 +82,7 @@ function ToggleInputRegEx(isInit){
   // validate submitted data against provided regex
   public function validate($result, $value, $form, $field) {
     // if validation has passed so far, and regex validation is enabled, and a pattern was provided, and a value was provided
-    if ($result['is_valid'] && $field['regexValidation'] && !empty($field['regexPattern']) && !empty($value)) {
+    if ($result['is_valid'] && $field['regexValidation'] && !empty($field['regexPattern']) && ( strlen($value) != 0 )) {
       $regex = '/' . $field['regexPattern'] . '/';
       if (preg_match($regex, $value) !== 1) {
         $result['is_valid'] = false;