{"id":457,"date":"2025-04-30T11:39:14","date_gmt":"2025-04-30T10:39:14","guid":{"rendered":"https:\/\/userswp.io\/documentation\/?post_type=gd_place&p=457"},"modified":"2025-04-30T11:41:26","modified_gmt":"2025-04-30T10:41:26","slug":"basic-invite-code-example","status":"publish","type":"gd_place","link":"https:\/\/userswp.io\/documentation\/article\/how-tos\/basic-invite-code-example\/","title":{"rendered":"Basic Invite Code Example"},"content":{"rendered":"\n

We had a user who was using a custom text field with the HTML5 validation as a sort of invite code system. The issue was that bots can easily bypass HTML5 validation, so some server-side validation is also needed. This is a short tutorial on how to implement custom server side validation for a custom field.<\/p>\n\n\n\n

First, Add a Custom Text Field <\/h2>\n\n\n\n

Go to UsersWP > Form Builder > Add a text field.
Make sure you note the “Key” in this case “invite_code”.<\/p>\n\n\n\n

Here, I have not added any HTML5 validation as it is not required if we are doing server-side validation.<\/p>\n\n\n

\"\"<\/figure>\n\n\n

Add the field to the register form<\/h2>\n\n\n\n

Above, I have set this to “Include this field ONLY in the register form”.<\/p>\n\n\n\n

Go to UsersWP > Form Builder > Register > Add the new field to the register form and drag it where you want it to show, I have added it as the first field.<\/p>\n\n\n

\"invite-code-register-form\"<\/figure>\n\n\n

Add the server-side validation<\/h1>\n\n\n\n

Below we add a code snippet to validate the invite code, note that the “invite_code” key used has to match the field Key. We have a list of valid invite codes, this list can be as long or short as needed.<\/p>\n\n\n\n

add_filter('uwp_validate_fields_before','_my_invite_code_check',10,3);\nfunction _my_invite_code_check( $errors, $data, $type ){\n\t\n\t\/\/ List of valid codes\n\t$valid_codes = array(\n\t\t'SAMPLE123',\n\t\t'CAT345',\n\t\t'BOB99',\n\t\t'123456',\n\t\t'POOL'\n\t);\n\t\n\n\t\/\/ only run chcks if we have data and its a register call\n\tif (!empty($data) && $type === 'register') {\n\t\t\n\t\t\/\/ if empty add an error\n\t\tif(empty($data['invite_code'])){\n\t\t\t $errors->add('not_logged_in', __('<strong>Error<\/strong>: Invite Code Empty', 'userswp'));\n\t\t}elseif(!in_array($data['invite_code'],$valid_codes)){\n\t\t\t\/\/ if used code is not in our list then add an error\n\t\t\t$errors->add('not_logged_in', __('<strong>Error<\/strong>: Invite Code Not Valid', 'userswp'));\n\t\t}\n\t\t\n\t}\n\t\n\treturn $errors;\n}<\/code><\/pre>\n\n\n\n
<\/p>\n\n\n\n
<\/span>We recommend using the Code Snippets<\/a> plugin to add snippets to your site.<\/span><\/div>\n\n\n\n
Result<\/h1>\n\n\n\n
Users will only be able to register if they have a valid invite code.<\/p>\n\n\n
\"\"<\/figure>","protected":false},"excerpt":{"rendered":"
We had a user who was using a custom text field with the HTML5 validation as a sort of invite code system. The issue was that bots can easily bypass HTML5 validation, so some server-side validation is also needed. This is a short tutorial on how to implement custom server side validation for a custom […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"article\/tags":[],"article\/categories":[41,7],"class_list":["post-457","gd_place","type-gd_place","status-publish","hentry","gd_placecategory-how-tos","gd_placecategory-tips-tricks-more"],"_links":{"self":[{"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/article\/457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/article"}],"about":[{"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/types\/gd_place"}],"author":[{"embeddable":true,"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/comments?post=457"}],"version-history":[{"count":0,"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/article\/457\/revisions"}],"wp:attachment":[{"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/media?parent=457"}],"wp:term":[{"taxonomy":"gd_place_tags","embeddable":true,"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/article\/tags?post=457"},{"taxonomy":"gd_placecategory","embeddable":true,"href":"https:\/\/userswp.io\/documentation\/wp-json\/wp\/v2\/article\/categories?post=457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}