Block Logic adds a “Block Logic” field to the “Advanced” section of the block editor (i.e Gutenberg), that lets you show or hide any block based on conditions. You can use WordPress’ Conditional Tags or any general PHP code.
Show or hide blocks based on
- User role
- User login status
- Post status
- Date and time
- The result of a custom PHP function
- Show or hide any block using conditions
- Combine conditions with “and” or “or” operators. See FAQ Writing Logic Code
- Full flexibility: use any condition you want
Just activate the plugin. The “Block Logic” textbox will then appear in the “Advanced” section of the Gutenberg editor.
Writing Logic Code
Make good use of WP’s own conditional tags. You can vary and combine code using:
!(not) to reverse the logic, eg
!is_home()is TRUE when this is NOT the home page.
||(or) to combine conditions.
X OR Yis TRUE when either X is true or Y is true.
&&(and) to make conditions more specific.
X AND Yis TRUE when both X is true and Y is true.
is_home()— just the main blog page
!is_page('about')— everywhere EXCEPT this specific WP ‘page’
is_user_logged_in()— shown when a user is logged in
is_category(array(5,9,10,11))— category page of one of the given category IDs
is_single() && in_category('baked-goods')— single post that’s in the category with this slug
current_user_can('level_10')— admin only blocks
strpos($_SERVER['HTTP_REFERER'], "google.com")!=false— blocks to show when clicked through from a google search
is_category() && in_array($cat, get_term_children( 5, 'category'))— category page that’s a descendent of category 5
global $post; return (in_array(77,get_post_ancestors($post)));— WP page that is a child of page 77
global $post; return (is_page('home') || ($post->post_parent=="13"));— home page OR the page that’s a child of page 13
Note the extra ‘;’ on the end where there is an explicit ‘return’.
The ‘block_logic_eval_override’ filter
Before the Block Logic code is evaluated for each block, the text of the Block Logic code is passed through this filter. If the filter returns a BOOLEAN result, this is used instead to determine if the block is visible. Return TRUE for visible.
With great power comes great responsibility
The block logic you introduce is EVAL’d directly. Anyone who has access to use the Gutenberg Editor will have the right to add any code, including malicious and possibly destructive functions. There is an optional filter ‘block_logic_eval_override’ which you can use to bypass the EVAL with your own code if needed.
- I’m getting “PHP Parse error… … eval()’d code on line 1”
You have a PHP syntax error in one of your block’s “Block Logic” fields. Review them for errors.
“Block Logic – Full Gutenberg Block Display Control” 是一個開源的軟體。以下的人對這個外掛作出了貢獻。貢獻者
- Initial Release of the plugin