added bot honeypot on signup

functions/account_functions.php

@@ -111,6 +111,7 @@ function signup_form($error_msg = '')
                 <input type="hidden" name="crop_x" value="" id="crop_x">
                 <input type="hidden" name="crop_y" value="" id="crop_y">
                 <input type="hidden" name="crop_width" value="" id="crop_width">
+                <input name="required_field" id="required_field" value="">
 
                 <label for="username">Username</label>
                 <input id="username" name="username" required>
@@ -151,8 +152,18 @@ function signup_form($error_msg = '')
     return $form;
 }
 
-function create_user($username, $email, $password, $verify_password, $role_id, $upload = null, $x = null, $y = null, $crop_width = null)
+function create_user($username, $email, $password, $verify_password, $role_id, $upload = null, $x = null, $y = null, $crop_width = null, $honeypot)
 {
+    if (!empty($honeypot)) {
+        $error_msg = '
+            <div class="error">
+                You are a bot. Leave now.
+            </div>
+        ';
+
+        return $error_msg;
+    }
+
     if ($password != $verify_password) {
         $error_msg = '
             <div class="error">