How can a plugin create a page/form in the front end?
See How do you create a “virtual” page in WordPress for the solution. This should work for your case as well.
plugin-development
Symbolic Links on dev box with plugins and stylesheets
Symbolic links are … risky in WordPress. It is easier to use a separate domain for plugins per wp-config.php: define( ‘WP_PLUGIN_DIR’, ‘/local/path/to/plugin/directory’ ); define( ‘WP_PLUGIN_URL’, ‘http://plugins.dev’); See Strategy On Building Plugin Using Eclipse as an example for IDE configuration with such a setup.
Get a path to a different plugin
My best guess would be: if ( ! is_file( $dir = WPMU_PLUGIN_DIR . ‘/pluginb/pluginb.php’ ) ) { if ( ! is_file( $dir = WP_PLUGIN_DIR . ‘/pluginb/pluginb.php’ ) ) $dir = null; } return $dir; However, the danger here is still the assumption of the plugin’s “basename” – a well written plugin will still function even … Read more
Add self-closing shortcode button to TinyMCE in WP 4.6
We start by adding the custom TinyMCE Button: function add_mce_button_custom_em() { // check user permissions if ( !current_user_can( ‘edit_posts’ ) && !current_user_can( ‘edit_pages’ ) ) { return; } // check if WYSIWYG is enabled if ( ‘true’ == get_user_option( ‘rich_editing’ ) ) { add_filter( ‘mce_external_plugins’, ‘add_tinymce_plugin_custom_em’ ); add_filter( ‘mce_buttons’, ‘register_mce_button_custom_em’ ); } } add_action(‘admin_head’, ‘add_mce_button_custom_em’); … Read more
Where to store plugin settings fields
It depends on how you are going to use the stored data. If you want to run complex queries against the values, use a custom table with indexes optimized for those queries. If you will always just fetch all the values for a given object, create a non-public custom post type, and store the data … Read more
How do I improve this admin query snippet to avoid generating duplicate results on non-meta searches?
A GROUP BY statement can group your posts after the JOIN. For WordPress you can use the posts_groupby filter. add_filter( ‘posts_groupby’, ‘my_post_limits’ ); function my_post_limits($groupby) { global $pagenow, $wpdb; if ( is_admin() && $pagenow == ‘edit.php’ && $_GET[‘post_type’]==’listings’ && $_GET[‘s’] != ” ) { $groupby = “$wpdb->posts.ID”; } return $groupby; }
What is the difference between $post_id and get_the_ID()?
get_the_ID() returns the ID of the current post by way of get_post. Get post assumes the current post to be the global variable $post unless passed parameters specifying otherwise. That means that get_the_ID() should return the same value as contained in $post->ID. Using get_the_ID() lets you avoid dealing with the global directly, though you are … Read more
WP_Query leaking absurd amounts of memory
Excellent responses on WP Hackers: http://lists.automattic.com/pipermail/wp-hackers/2012-June/043213.html What you’re doing with that query, is loading EVERY matching post into memory, including the full post contents. As you can imagine, this is probably quite a lot of items. You can pass ‘fields’ => ‘ids’ into WP_Query to simply return a list of matching post_ids instead, which should … Read more
How to debug a plugin with Xdebug?
There is an easy solution with a Firebox extension Xdebug Helper by Brian Gilbert. This sets cookies for the xdebug session which allows you to use xdebug within your WordPress plugins. There are also extensions for Chrome, Safari and Opera. The links can be found on the xdebug website
Adding Widget form fields dynamically
Interesting Question! I’ve never seen repeatable fields used in Widgets. Giving a full Answer would require too much work/time, so I’ll give you links to the resources I know, and hopefully you’ll make this work and share the solution with us 😉 All this examples deal with Meta Boxes, you’ll need to copy the jQuery … Read more