In the save_post hook, When you are saving your post`s meta, Check initially for the required fields.
If it contains no value, You can straight away redirect user to the admin referrer with an appropriate error message.
You can also go for HTML5 required validation. That will be more efficient.
<input type="text" required>
Related Posts:
- Add validation and error handling when saving custom fields?
- How to store the value of a custom field dropdown select for post referencing?
- Get updated meta data after save_post hook
- Check before publishing, if already exist post with current custom field value
- Check if the value of a field has changed on save_post
- Get updated meta value after post update or published (custom post type) using hook
- custom-meta-box checkboxes from loop won’t save
- Saving Custom Field Data before Publish
- Allow only one post with specific meta value
- Custom metabox not displaying multiselect data in edit mode
- How to validate select field in post meta?
- frontend submit post jQuery clone row won’t save
- Can wp_insert_post_data filter be used to save custom field data?
- Exclude URL’s from sanitize_html_classes
- Use value from ACF to populate other fields
- update a custom field with the value of another existing custom field
- Why WordPress takes time to make request to save post?
- Saving metadata of related post on save_post
- added a meta box to post however when saving menu while debug on throws a warning
- Multiple triggers when publishing, saving or updating a post in WordPress
- Set post status to draft after validating post meta values in save_post hook
- Custom fields empty after refreshing page
- Advanced Custom Fields: how do I check to see if a value is set in an field? [closed]
- WP_Query – Order results by meta value
- Add filter menu to admin list of posts (of custom type) to filter posts by custom field values
- getting all values for a custom field key (cross-post)
- How to add a custom field in the advanced menu properties?
- Custom query with orderby meta_value of custom field
- How to filter post listing (in WP dashboard posts listing) using a custom field (search functionality)?
- Using meta query (‘meta_query’) with a search query (‘s’)
- Can I exclude a post by meta key using pre_get_posts function?
- Query to sort a list by meta key first (if it exists), and show remaining posts without meta key ordered by title
- Prevent post from being published if custom fields not filled
- Show Custom Fields in Quick Edit
- Where are custom field values stored in the database
- Validating Custom Meta Box Values & Required Fields
- Max length of meta_value
- Add custom fields to wp native gallery settings
- How to fix missing custom fields after upgrading to WordPress 4.8.1?
- How to enable custom fields for pages (if not a bad practice)?
- How can I add extra attribute in the ‘Page Attribute’ section in wp-admin for pages?
- Is there a way to set default custom fields when creating a post?
- Custom post meta field effect on the performance on the post
- How to get custom post meta using REST API
- Custom field/meta populated by dropdown of existing posts?
- Difference between meta keys with _ and without _ [duplicate]
- Is there any action filter/hook for validating a custom field before publishing the post?
- Remove Dimension from wp_get_attachment_image
- Orderby meta_value only returns posts that have existing meta_key
- Underscores in custom fields
- What is the index [0] for on post meta fields?
- What is “meta_input” parameter in wp_insert_post() used for?
- Query Posts or Get Posts by custom fields, possible?
- How to enable revisions for post meta data?
- Sortable Custom Columns in User Panel (users.php)?
- Any way to add custom options to Gallery Settings?
- The “_encloseme” Meta-Key Conundrum
- ORDER BY custom field value
- Individual Widgets per Page
- Add subtitle to Woocommerce product title
- Best way to programmatically remove a category/term from a post
- Importing data for advanced custom fields plugin?
- Gutenberg add a custom metabox to default blocks
- SQL Query to copy value of a meta_key into another meta_key
- ‘Preview Changes’ for custom meta boxes?
- Adding a custom field to the site identity menu
- Using TinyMce with textareas in meta boxes on custom post types
- Filter WP_Query for posts having a certain meta-value
- How to correctly call custom field dates into a posts_where filter using SQL statements
- Using get_post_meta with new_to_publish
- Is there a way to get protected meta fields through any of the available built-in WordPress APIs? (xmlrpc, wp-json)
- Add a Jquery Datepicker to custom field in post edit
- add meta box – custom field : which to choose?
- Preserving line breaks when saving and displaying custom fields data
- How to return Meta data from the REST API?
- Advanced Custom Fields – Get custom fields from parent page
- Can I query custom meta data through WP_Query
- Add custom field to the archive page?
- Saving custom data for each user
- Is it safe to store a user setting you don’t want the user to ever modify as a user option?
- Tabindex on text input immediately after WordPress title input
- Including custom fields in search?
- Add custom fields to search
- SELECT max(meta_value) FROM wp_postmeta WHERE meta_key=’price’… stops working when value is over 999
- Attaching Metadata to a Taxonomy Item
- Add metabox to document tab in gutenberg
- How to display all custom fields associated with a post?
- How to add add_meta_box to specific Page Template?
- How to rename a custom field?
- Apply the_content filter to a custom field with multiple values
- Filter post listing by meta value which is a date
- Extra profile field as select box?
- Matching Serialized Arrays with meta_query
- How can I make wp-pagenavi work on a custom query built upon a form submission? [closed]
- Custom field metabox not showing in back-end
- Meta Query with AND & OR?
- Pre-filling custom fields on New Post
- Having different sidebar content for MANY pages?
- So much data in postmeta
- Custom search: by post data and post metadata?