Hi @janoChen: The correct answer is: “It depends.” In general it is better to use built-in WordPress functions than to use direct SQL when there are built-in functions that can provide you what you need. However, the answers to many of the questions I see here on WPSE are (unfortunately) “you need to use direct … Read more
You can buy the Professional WordPress Plugin Development book from Amazon: http://www.amazon.com/Professional-WordPress-Plugin-Development-Williams/dp/0470916222 I’m learning tons from it and it’s packed full of good information about best practices. It will walk you through building your own plugin with lots of code samples. I cannot recommend it enough. If you’re serious about learning to write plugins then … Read more
Multisite Plugin Manager The essential plugin for every multisite install! Manage plugin access permissions across your entire multisite network.
I wrote a tutorial for Incorporating the Settings API in WordPress Themes. The only real difference for Plugins is that you’ll use add_settings_page() instead of add_theme_page(). The rest should pretty much be the same.
Use the woocommerce_product_categories_widget_args and woocommerce_get_availability filters in a custom function to filter the product categories widget for out of stock products. See what you can come up using these filters and post the code back here if you get stuck. Here’s some code from my site which may help you get started. add_filter( ‘woocommerce_product_categories_widget_args’, ‘wpsites_exclude_product_cat_widget’ … Read more
I think a combination of the answers so far along with an admin area field to disable the author archive(s) is the best bet. A class to wrap everything up (along with some constants and methods that will be clear later): <?php class Author_Archive_Disabler { // meta key that will store the disabled status const … Read more
You need to use a plugin page-specific script enqueue hook. Edit Best-practice method is to use admin_enqueue_scripts-{hook}, rather than admin_print_scirpts-{hook}. But, because you’re targeting your own Plugin’s admin page specifically, either one is perfectly fine. The hook to avoid is the “global” admin_print_scripts. Original The call would look like this: /* Using registered $page handle … Read more
The option will be stored in the table $wp_prefix . “options” as an array. You can get the option with $myoptions = get_option(‘plugin_options’); try var_export( $myoptions ); to see that. There is also a hidden page in wp-admin/options.php where you can see all saved options.
<?php /* Plugin Name: Custom output Description: A module to test the custom output. To test: http://your_wordpress_site.com/customop_uri_path Version: 1.0 Author: Danilo Silva Author URI: http://danilocgsilva.me */ // Write a new permalink entry on code activation register_activation_hook( __FILE__, ‘customop_activation’ ); function customop_activation() { customop_custom_output(); flush_rewrite_rules(); // Update the permalink entries in the database, so the permalink … Read more
I work with several large WordPress sites, news sites specifically, that have thousands of posts and thousands of visitors (300k/day). With the stuff below, and a well coded theme, with well written queries, we’re loading in 2.5s with 7 ad blocks from AdSense and RevContent. Do you have a CDN? I highly recommend a CDN … Read more