WordPress Plugins allow easy modification, customization, and enhancement to a WordPress blog. Instead of changing the core programming of WordPress, you can add functionality with WordPress Plugins.

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5
votes
1answer
591 views

Wordpress URL Rewrite not working

I'm trying to create a custom url rewrite for my wordpress plugin. function insert_plugin_rewrite_rule($rules) { global $wp, $wp_rewrite; $wp->add_query_var('update_slug'); $ret = ...
5
votes
3answers
701 views

Plugin directory “Last Updated” not changed after initial commit?

I released the first version of my Rewrite analyzer plugin with a commit on 2010-05-12. The WordPress.org plugin directory however still displays 2010-11-27 as the "Last Updated" date - this is the ...
5
votes
1answer
10k views

How can a plugin create a page/form in the front end?

How can a plugin create a page/form in the front end thats not listed in pages (if possible). it should only be accessed through a direct link.
5
votes
1answer
193 views

WordPress and multithreading

I'm working on a plugin. I've created an API that reads and writes to a custom table in the DB. This API can be called potentially from N clients simultaneously (and it really happens). I noticed that ...
5
votes
1answer
95 views

Get specific color from admin color scheme

I know how to print the current color scheme by using: echo get_user_option( 'admin_color', get_current_user_id() ); or echo get_user_meta(get_current_user_id(), 'admin_color', true); but I need ...
5
votes
2answers
2k views

custom XMLRPC method plus authentication of user & WooCommerce order

I'm working with a custom XML-RPC method to capture some information for a plugin I am building. When activated the user has to authenticate themselves by entering there user/password given to them ...
5
votes
1answer
127 views

Best way to flush_rewrite_rules for custom post type, in a mu-plugins plugin?

I am writing a plugin that instantiates a custom post type (among other things). It is a multisite plugin and lives in the directory mu-plugins. What is the best practice for handling ...
4
votes
8answers
6k views

is_plugin_active function doesn't exist

I'm using WordPress 3.0.5 and have tested with 3.1rc4. In the main PHP file of my plugin, when I try to call is_plugin_active I get Call to undefined function is_plugin_active(). I can call add_action ...
4
votes
2answers
6k views

how to create child WordPress plugin

I like to create child plugin.. Explanation :- I have one parent plugin named X. This will work independently (like other existing plugins). Now I decided to add some extra features to that plugin ...
4
votes
1answer
5k views

Update Option Stored in Multi-Dimensional Array

I have data in the wp_options table currently stored as a multi-dimensional array (profile_element_order): ...
4
votes
2answers
198 views

Where do I start from

I'm student web developer and I'd like to know the things I should know before venturing into WordPress. Where do I start?
4
votes
3answers
8k views

How to call a plugin function from index.php [closed]

I have created a function in my plugin myplugin with the name foo, how to call it from the frontend? e.g. index.php?
4
votes
2answers
1k views

WP 3.3 Tooltips API?

Does anyone have a tutorial on how to implement the new Tooltips API into a theme or plugin? I'm eager to tap into this to help first time users of my theme and plugins. From mashable'e excellent ...
4
votes
4answers
376 views

Where is it better to start learning how to develop for Wordpress?

I have already read this question and answer to it ( Where do I start from ). So I have slightly different question. If I basicaly have no knowledge of how the WordPress code is structured and I have ...
4
votes
3answers
2k views

Creating two database tables via plugin

I'm working on a voting plugin for my site and I want to create 2 tables: one that stores votes and another that stores voter ips. In Codex it suggests to use an if statement to see if the table has ...
4
votes
2answers
4k views

How to pass a parameter to this add_filter example [duplicate]

I have a class with this function to provide a user language based on $user_id function provide_user_language($user_id) { return apply_filters('get_user_language',$user_id); } So in my script, I ...
4
votes
3answers
2k views

body_class hook for admin pages

The body_class hook seem only to work with non-admin pages. When I do add_filter('body_class', 'add_body_classes'); function add_body_classes($classes) { $classes[] = 'myclass'; ...
4
votes
3answers
253 views

Custom Post Type Link from Plugin

I'm currently working on a plugin that creates a custom post type. The issue I'm strugging with at the moment is that the custom post type is created fine, but when I go to add a new post I receive ...
4
votes
1answer
433 views

Nonces can be reused multiple times? Bug / Security issue?

I've read that nonces are meant to be for one time use only, and after an ajax request, you should issue a new nonce so with the next ajax request, a new nonce would be sent to the server. However, I ...
4
votes
4answers
242 views

Can i do plugin commits directly from a plugin folder inside an installation using the Trunk SVN

I have several virtual hosts setup, three of them pull files via SVN when needed(though only the trunk folder actually needs this), using SVN for other versions make for easy patch creation, or easy ...
4
votes
3answers
3k views

Creating a default Custom Post Template that a Theme can override

I'm in the midst of building a Wordpress Plugin that adds a custom post type, for which I'd like to include a default template to display. Essentially, this is an event management plugin, and the ...
4
votes
2answers
5k views

Get post ID from the Create post/page admin interface?

I am adding a meta box in the create post/page interface and I want to get the ID of the post being edited/created so I can dynamically display the value of the input field. From the wordpress codex ...
4
votes
3answers
2k views

Is there a hook for when you switch themes?

I created a plugin but I just came across a bug that I don't really know how to solve. When you activate my plugin, it creates a file in the active theme directory and when you deactivate it, it ...
4
votes
4answers
2k views

How to Get a List of Sub Blogs without Using get_blog_list()?

The get_blog_list() function has been deprecated from v3.0. How does one get a list of blogs in a multisite blog?
4
votes
2answers
3k views

Is There A Hook To Process The Content Of The Text Widget?

Is there any filter which can be used in a plugin to process the content of the text widget before it is rendered?
4
votes
2answers
6k views

How to validate custom fields in custom post type?

I wrote a plugin that creates a custom post type with custom fields. To prevent users from entering incorrect information, how can I validate the data? I assumed that the save_post hook function ...
4
votes
2answers
1k views

Edit or Remove Plugin .htaccess Using The Admin Panel

I am looking for a way to edit or reset the .htaccess file for a wordpress site without access to the filesystem, working only with the wp-admin web interface and/or plugins* (see below for the back ...
4
votes
2answers
6k views

What is the difference between the “wp_footer” and “get_footer” actions?

I am working on developing a plugin, and I am trying to add a line of text to the bottom of the page, I see there are two actions that seems reasonable, wp_footer() and get_footer(). wp_footer sounds ...
4
votes
1answer
4k views

wp_mail is undefined

I am writing a plugin that opens up a form to invite people to a website by email and want to use wp_mail(). Whenever I use the wp_mail() function in any file in my plugin folder I always end up ...
4
votes
1answer
51 views

Does a plugin's “main” file need to be named the same as the folder containing it?

I remember - many moons ago - debugging a plugin that I was building for a very, very, long time. The only thing that fixed my issue (which I can't remember for the life of me), was to name the ...
4
votes
3answers
11k views

Wordpress Vote Plugin - Vote Once and Track User

I've been looking through voting plugins and cannot seem to find one that works for me. I'm hoping you can help me out before I have to build my own as I'm tight on time. I have a page that will be ...
4
votes
1answer
2k views

Export data as CSV in back end with proper HTTP headers

I wrote a plugin that displays all products in a woocommerce store in admin settings option, now I want to add a link to download the products as CSV file. The problem is, when I click the link I get ...
4
votes
1answer
2k views

function deactivate_plugins does not exist

I am getting function deactivate_plugins does not exist error when calling this function function deactivateSelf(){ deactivate_plugins(RSD_PLUGIN, true); //gives error: function ...
4
votes
2answers
3k views

Dashboard like meta boxes in my plugin - how to save their position and open/closed state?

I am trying to mimic the dashboard meta boxes UI in my WP plugin - the small metaboxes. I have already styled them and also the drag & drop feature works as I loaded the following script and ...
4
votes
1answer
138 views

Turn Shortcode Gallery into Carousel in WordPress 4.4

I searched for existing plugins that could do carousels in wordpress posts but they turned out to not display correctly in WordPress 4.4 which released recently. ...
4
votes
2answers
420 views

How to read configuration file in wordpress or PHP

I am not sure how relevant this is,i am working with Java based web-application, so in some cases we need to define some properties which can be used in entire web application like Google API Key ...
4
votes
1answer
158 views

Does WordPress have an Browser Agent?

I want to block a directory to everyone but WordPress's internal upgrade feature (I am trying to get WordPress to do auto-updates of my premium plugin). I have it updating, but I really would like to ...
4
votes
1answer
116 views

How Do I Load My Action Earlier Enough?

With add_action, I want to intercept as early as I can in my plugin and send a 304 Not Modified header per some rules. Does anyone know what the order is of events? When I view this page, it seems to ...
4
votes
2answers
49 views

What is the correct way for a theme to support plugin UIs?

For instance if my plugin is creating a form on a page, what can I do to make it as easy as possible for theme developers to skin the form too?
4
votes
2answers
3k views

ajaxurl not defined on front end

I am trying to create a ajaxform on the front side. I am using the code jQuery.ajax( { type: "post", dataType: "json", url: ajaxurl, data: ...
4
votes
2answers
324 views

Wordpress plugin from own server

I am developing a game, and I am planning that, I will have partners, so they can run a game like mine. For this, I developed a plugin, with some classes, and functions, to handle the game requests. ...
4
votes
1answer
334 views

How Can I Add a Filter to Class Instance Only?

I have a custom class which I use for several cases extending it, for example class A { public function show_things() { print_r( apply_filter( 'yet_another_filter', array( 'coffee', ...
4
votes
3answers
913 views

How to delete custom taxonomy terms in plugin's uninstall.php?

I am writing my plugin's uninstall.php file and would like it to delete any terms that were created in the plugin's custom taxonomy. In the plugin's uninstall.php file I am using this: // Delete all ...
4
votes
3answers
63 views

How to sync with plugins update after I have done manual optimizations?

I have several WordPress running plugins on my site and as per suggestions of wordpress performance optimizations I am planning to do the optimizations on plugins myself. However, that will mean ...
4
votes
1answer
122 views

Output in XHTML or HTML 5 for plugins?

I'm currently writing a plugin that displays some images - possibly with captions. So, I was wondering whether to use XHTML (<div>s and <span>s) or HTML 5 (<figure> and ...
4
votes
1answer
898 views

How do I “replace a function via plugins” in WordPress?

I'm new to WordPress and am not understanding their docs. What I'd like to do is to replace the wp_hash_password (and a few other password related functions) with my own. I've already written the ...
4
votes
1answer
3k views

Hook the Keydown Event in the TinyMCE Post Editor

I would like to hook the keydown event in the TinyMCE Editor on the edit post admin page. I managed to hook the HTML content editor using the following code: jQuery('#content').keydown(function(){ ...
4
votes
1answer
846 views

Is it possible to add an admin page using add_submenu_page() and pass a var in the query string?

I am making a plugin and I have a bunch of different data types that I am creating edit pages for. I'd rather not have to create a separate function to add each one to the admin menus, since they're ...
4
votes
3answers
2k views

How to auto-upgrade my plugin?

How do I have my plugin pop up with that New version available. Upgrade Automatically dialog to appear when my plugin has a new version? Specifically for plugins not hosted on the WP.org repository.
4
votes
2answers
4k views

Is There a WordPress Hook to Filter the Edit Posts View?

I want to be able to customize the WordPress edit posts screen to filter based on a custom field (or whatever). Unfortunately I'm not sure what filter or hook to use here, and instead of opening the ...