You can use spaces and uppercase chars(periods, commas, and more) without worry. Only time you’ll see any problems is with register_globals on(strict array key names when enabled), but who has it enabled these days?
Any of these should be fine as custom field names.
- My Image
- My.Field
- 112,Hello
Use whichever you prefer.. 🙂
Related Posts:
- 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?
- Add validation and error handling when saving custom fields?
- Query to sort a list by meta key first (if it exists), and show remaining posts without meta key ordered by title
- 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?
- How to access custom order item meta data from a meta key in WooCommerce?
- Problem with serialized arrays in custom meta
- Show only posts which can be commented OR have custom meta field
- Add custom objects/entities to WordPress
- explode array within shortcode
- Can I count the number of users matching a value in a multiple value key?
- Pass all custom fields through the same filter on post load?
- Need small coding with Custom Fields Search
- Change behavior of “Insert into Post” based on attachment metadata
- How can I append custom data to images in the editor?
- Using get_posts with arguments found in meta keys
- Add custom fields when specific templates are selected
- Sort posts by custom field numeric value using dropdown
- Adding Custom Field to Taxonomy Input :Panel
- How to position a custom field before the editor
- Display custom field value on woocommerce product page
- Advanced Custom Fields Validation
- Save custom user meta on registration
- When using add_post_meta and update_post_meta, is there any way to give the individual arrays keys?
- How to hide meta box values from custom fields list?
- How to get users by a custom field / by user meta data?
- Auto sort the wp-admin post list by a meta key