filters - Read For Learn

How to add icons to post listing (edit.php) in admin

We can style the table with CSS and dashicons. Example: For our video category, we can use for example: .edit-php .wp-list-table tr.category-video td.post-title strong:before { content: “\f126”; color: #ccc; display: inline-block; width: 20px; height: 20px; margin: 0 4px; font-size: 20px; line-height: 20px; font-family: “dashicons”; font-weight: normal; vertical-align: top; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; } where we … Read more

What do add_filters() and apply_filter() do?

What are you attempting to filter? I’ll assume you’re trying to add a filter to a filter hook called posts_before. In which case, you need to add your filter to this hook, via add_filter(): function mytheme_filter_posts_before( $where=””, $date) { $where .= ” AND post_date < ‘” . $date . “‘”; return $where; } // Add … Read more

How to add some custom HTML into wordpress admin bar?

You’re right on track with the work that needs to be done, and WordPress makes is really simple to accomplish what you’re going for. The hook that you’re looking for is called admin_bar_menu. You can read more about it and the WP_Admin_Bar class here. The other step to get the post count could be done … Read more

Modify WordPress Rest Api Request/Response

I think I found answer to your question, it is: rest_{$this->post_type}_query filter hook. With this hook you are able to directly edit internal WP_Query parameter. For example, if you’d like to internally sort Posts by post_title by default, then you’d have to write something like this: function order_rest_post_by_post_title($args, $request) { $args[‘orderby’] = ‘post_title’; $args[‘order’] = … Read more

Check if a filter or function has been already been called

You can use a static variable to achieve this: add_filter( ‘the_content’, ‘asdf_the_content’, 99, 1 ); function asdf_the_content( $content ) { static $has_run = false; if ( $has_run ) { return $content; } $has_run = true; // check if the_content has already been // filtered by some other function $content = ucwords( $content ); return $content; … Read more

Filter hook before create order WooCommerce

Stumbled on this looking for the same thing which I’ve now figured out (Woocommerce 3.x)… add_filter( ‘woocommerce_checkout_create_order’, ‘mbm_alter_shipping’, 10, 1 ); function mbm_alter_shipping ($order) { if ($something == $condition) { $address = array( ‘first_name’ => ‘Martin’, ‘last_name’ => ‘Stevens’, ‘company’ => ‘MBM Studio’, ’email’ => ‘[email protected]’, ‘phone’ => ‘777-777-777-777’, ‘address_1′ => ’99 Arcadia Avenue’, ‘address_2’ … Read more

Add whitespace between Chinese and other letters

Interesting question. This could be a useful part of a specific language file. It cannot be done in CSS, because CSS is (mostly) character agnostic. But using a filter and PHP it is possible and on topic: add_filter( ‘the_content’, ‘t5_chinese_spacing’ ); function t5_chinese_spacing( $content ) { return preg_replace( ‘~([^\p{Han}]*)(\p{Han}+)([^\p{Han}])~imUxu’, ‘\1 \2 \3’, $content ); } … Read more

How can I add an Author filter to the Media Library?

In your question you showed the image which is grid-view and that codex belongs to list-view. So I am confused here for which section you are talking about. Grid View : not possible unless you change the core as they don’t provide any hook and the whole media section was created by jquery, backbone and … Read more

What hook do I use to edit the post statuses option in admin?

You can use the filter views_edit-post (or views_edit-{custom-post-type}) to modify the available “views”: add_filter(‘views_edit-post’, ‘cyb_remove_pending_filter’ ); function cyb_remove_pending_filter( $views ) { if( isset( $views[‘pending’] ) ) { unset( $views[‘pending’] ); } return $views; } In the above filter you need inlude the user rules you want to apply. For exmple, if you want to remove … Read more

Passing Additional Parameters to add_filter Callable

The second parameter in add_filter is a function with accepted arguments, not returned values. This is an example how I pass my custom array $args to change an existing array $filter_args: add_filter( ‘woocommerce_dropdown_variation_attribute_options_args’, function( $filter_args ) use ( $args ) { return eswc_var_dropdown_args( $filter_args, $args ); } ); function eswc_var_dropdown_args( $filter_args, $args ) { $filter_args[‘show_option_none’] … Read more

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