plugins - Read For Learn

What WordPress API function lists active/inactive plugins?

wp_get_active_and_valid_plugins() get_plugins() and get_option(‘active_plugins’)

Where is get_header(‘shop’) file in Woocommerce templates

get_header( $name ) is a WordPress function, that will try to load the file header-{$name}.php from your theme’s root folder. If this file doesn’t exist, WordPress will load the default header.php file.

Why is “plugins_loaded” not called/fired?

Have a look at the wp-settings.php file. You’ll see that the plugins_loaded action is triggered before the theme is loaded. The first action available for themes to hook into is the after_setup_theme action.

Removing the “Your backup folder MIGHT be visible to the public” Message Generated by the WP-DBManager Plugin

gear-solid**: Looking in the Source Code… Here’s the function from WP-DBManager Plugin that generates that error: function dbmanager_admin_notices() { $backup_options = get_option(‘dbmanager_options’); if(!@file_exists($backup_options[‘path’].’/.htaccess’)) { echo ‘<div class=”error” style=”text-align: center;”>’.__(‘Your backup folder MIGHT be visible to the public’, ‘wp-postratings’).'’.sprintf(__(‘To correct this issue, move the .htaccess file from wp-content/plugins/wp-dbmanager to %s’, … Read more

WordPress Plugin Development In MVC Architecture, How?

You could definitely use an MVC philosophy in the development of a plugin, but you would be really silly to try to incorporate CI or Cake in addition to WP. For instance, you could build out a plugin using the following pseudo structure (FYI, there are a ton of ways to build this, depending on … Read more

Prevent trash/delete action on specific post types

Here’s another approach using the map_meta_cap filter that’s applied within the map_meta_cap() function within the has_cap() method of the WP_User class (PHP 5.4+): add_filter( ‘map_meta_cap’, function ( $caps, $cap, $user_id, $args ) { // Nothing to do if( ‘delete_post’ !== $cap || empty( $args[0] ) ) return $caps; // Target the payment and transaction post … Read more

Display products from specific category in shop page

The shop page is actually an archive page for posts of type ‘product’. Its template is in woocommerce/archive-product.php. You need to use the pre_get_posts action to preprocess the query before the loop, conditional_tags to recognize that you are in the product archive page, and a taxonomy query to filter the product categories, which belong to … Read more

Best practice way to delete user meta data during plugin uninstall?

You should not access the database directly, if at all possible. There are two main reasons for this: If the database structure changes (unlikely), your queries may become outdated. Using functions like delete_user_meta() will ensure that your query should work properly for all WordPress versions (past, present, and future) that support that function. Caching. If … Read more

Remove action from plugin on other plugin

There are two things that confuse people when trying to remove a hook: The remove_action() or remove_filter() calls must take place after the add_action() or add_filter() calls, and before the hook is actually fired. This means that you must know the hook when the calls were added and when the hook is fired. The remove_action() … Read more

How to only hook on Single.php after content?

This will handle appending the content to single posts: function yourprefix_add_to_content( $content ) { if( is_single() ) { $content .= ‘Your new content here’; } return $content; } add_filter( ‘the_content’, ‘yourprefix_add_to_content’ );

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