plugins - Read For Learn

Disabling Comment Notifications for Post Author

I skimmed through the source of the wp_notify_postauthor() function and noticed the comment_notification_recipients filter. I wonder if you could simplify your plugin to the following code snippet: <?php /** * Plugin Name: Disable comment/trackback/pingback notifications emails * Plugin URI: http://wordpress.stackexchange.com/a/150141/26350 */ add_filter( ‘comment_notification_recipients’, ‘__return_empty_array’, PHP_INT_MAX ); add_filter( ‘comment_moderation_recipients’, ‘__return_empty_array’, PHP_INT_MAX ); where we use an … Read more

Rewriting ‘rewrite’ slug for custom post type used by plugin

I searched everywhere in post type registration flow but didn’t found a right way (using filter or action) to do it. All you can do either register the post type again with a different slug (I prefer) or just run those lines of code which WordPress run to build the rewrite rules in register_post_type. I … Read more

How does WordPress Multisite know that a Plugin is installed?

You can clearly see the way WordPress loads plugins if you inspect the source code of the file wp-settings.php. The function wp_get_active_and_valid_plugins() loads plugins for individual sites in the network and for non-Multi-Site installations, while wp_get_active_network_plugins() loads network activated plugins when Multi-Site is enabled. The former more or less just calls get_option() to get the … Read more

Loading posts associated only to the logged in user on recent posts page

You should be able to get the current logged in user ID and then use pre_get_posts to alter the main query on the home/blog page to only show posts from that specific user. As I understand, you are talking specifically about authors. You might want to also check the user’s capabilities as well as simple … Read more

WooCommerce – Load Templates From Plugin For All Template Files

WooCommerce uses the template_include filter/hook to load main templates like archive-product.php and single-product.php. And here’s the class which handles main templates. And there’s a filter in that class which you can use to capture the default file (name) which WooCommerce loads based on the current request/page — e.g. single-product.php for single product pages. You can’t, … Read more

Multiple plugins vs combined one

If it’s exactly the same code, then no – it shouldn’t cause any performance changes… Why? Because loading a plugin is pretty easy (hence quick) process. It all happens in wp-settings.php and this is the code: // Load active plugins. foreach ( wp_get_active_and_valid_plugins() as $plugin ) { wp_register_plugin_realpath( $plugin ); include_once( $plugin ); } unset( … Read more

Is their any way to Extend WPDB class and Overwrite the Default Query Function

Calling wp_set_wpdb_vars() after replacing $wpdb will probably do the trick. $wpdb = new My_DB(); wp_set_wpdb_vars(); However, the only officially supported way to replace wpdb is to place a db.php in wp-content folder. If you can, I would suggest to do that.

Difference between deactivating, uninstalling, and deleting plugins

From the docs about wp plugin delete: Deletes plugin files without deactivating or uninstalling. so after runing the comand on a plugin I would expect the admin plugin page showing the warning about the missing plugin being deactivated and all the uninstalling database related actions have not taken place. Just run uninstall with the –deactivate … Read more

Is there a hook attached to general settings save?

You just need to register_setting() on your setting and it will be saved automatically. See the Settings API for more info. Here’s a complete example: function spw_cb() { if( !($value = get_option(‘sprockets_per_widget’)) ) { $value = 7; } ?> <input type=”text” size=”3″ name=”sprockets_per_widget” value=”<?php echo $value; ?>” /> Numeric only! <?php } function spw_init() { … Read more

For performance is it better to build custom functionality into the theme or a plugin

You’re not going to get a noticeable difference doing it one way over another. Slowness comes from what the code is doing. If you’re worried about performance, just make sure you’re caching external requests whenever you can, that includes calls to the database.

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