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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3
votes
2answers
1k views

Overwriting Core Wordpress Functions with Plugins

Is there a way to overwrite a core function is the Wordpress core using a plugin? I don't need to inject code, I need to replace the function entirely with a re-written version. The specific function ...
2
votes
1answer
1k views

How to show custom message once on plugin activation?

I know by watching the akismet plugin source how to show a custom message on the plugins page, but I want my message to appear only once after my plugin is activated. How could i do this?
2
votes
2answers
440 views

Adding callback function for wp_ajax_ has no effect

I was trying to add one more callback function to the WordPress AJAX action woocommerce_apply_coupon. This action is defined in the WooCommerce plugin, I want to add my own callback function to this ...
2
votes
1answer
2k views

What action is called when drafts are saved?

I would like to add a metadata field to the current post based on a checkbox in a custom meta box to be able to toggle my custom plugin on a post by post basis. For this I coded the following things ...
2
votes
2answers
2k views

Headers already sent error with CSV export plugin

I have built a Wordpress plugin that allows the user to export all pages, with their levels and urls, to a csv file. The problem I have is that I keep getting error messages when trying to export ...
2
votes
3answers
6k views

When do I need to use esc_attr when using WordPress internal functions

When I am putting a WordPress value inside the attribute tag, for example, the following method does not need esc_attr e.g. // JS code alert('<?php echo get_bloginfo('name');?>'); the ...
2
votes
1answer
1k views

How can I track active users of my plugin? and why doesn't WordPress.Org offer this?

It seems every major app platform from Android to iOS has great stats for developers. However, if you publish a plugin via WordPress.org you are not allowed to include any 3rd Party tracking code (for ...
2
votes
1answer
299 views

Wordpress Media mime type filter problem 4.0

I have added new mime types with the 'post_mime_types' filter eg. PDF, doc, mp3 etc... Filtering by custom mime type on the upload.php page in media grid view works as expected but in list view it ...
2
votes
5answers
839 views

How to debug WordPress correctly?

I'm using a few plugins and UpThemes framework on my new website and if I turn on Wp Debug I can see that there are a few errors related to Deprecated functions (but website is working). What I would ...
2
votes
2answers
1k views

Calling clean_term_cache() fails when called in the same plugin that creates terms, succeeds when called separately?

My plugin code is below. In the myPlugin_cleanup() function, I'm creating some categories and assigning term id 1 as the parent. Due to the known bug with creating categories via script (the ...
2
votes
3answers
1k views

How to: get main plugin/theme file?

There're the functions get_theme_data(); & get_plugin_data(); - which both use get_file_data(); that needs a specific file as $input. I got a set of classes that may be used by a plugin or a ...
2
votes
1answer
690 views

How to set a fall back template for a custom post type in a plugin?

My custom plugin creates a custom post type, and I want to theme my own "single-my_custom_cpt.php" file. However, I want to store it in my plugin folder, and allow that it be over-written in the ...
1
vote
1answer
139 views

which action to hook to in order to perform post-publish action

I have some functionality I've written in order to post the title and link for the post to twitter whenever a post is published. I'm wondering which wp function to hook this to? save_post has no real ...
1
vote
1answer
849 views

Check spam in custom form - akismet

I have a plugin that has input form, I have decided to check submitted data with akismet. I do have API key, WP comments are filtered correctly... here is, what I found: http://www.binarymoon.co.uk/...
1
vote
3answers
710 views

WordPress 4.0 Cookie Authentication to avoid nonce error when publishing a post and page

Cookies are now tied to internal sessions in WordPress 4.0. This means plugins using basic cookie authentication will have trouble because a token is required for publishing a post or page (as well ...
1
vote
1answer
490 views

How to add a new plugin page under desired Options page?

Using WordPress Settings API tutorial I created a new custom menu and corresponding sub menus. Each of my menus have a page of its own. I used add_menu_page() and add_submenu_page() for that. (Here is ...
1
vote
3answers
3k views

Conflicting save_post functions when passing the post id and saving custom meta boxes for different post types

Post save functions are conflicting with each other when adding them to the save_post action hook. 2 different custom post types with 2 different (one for each post type) custom meta boxes. I'm ...
1
vote
1answer
115 views

Plugin development, hooks, generate content

I'm building my first plugin. This plugin will activate a theme, set up a default front page, register tax. / cpt, and create some content. (cpt = custom post types) I made it work all this in ...
1
vote
1answer
2k views

How to bundle a plugin with a theme, or vice versa

First off, I'm all about separating design and function. In fact, I want to remove some of the functionality from a webcomics management theme I'm developing into a plugin. I expect a person's ...
1
vote
4answers
2k views

How to link to images in my plugin regardless of the plugin folder's name

What is the correct method to refer to images from within your plugin code, so that no matter what the folder is named, they resolve correctly? I had an issue where a user downloaded my plugin twice, ...
1
vote
2answers
615 views

Missing “category_children” option when dynamically creating categories via a plugin

I've isolated the source of a fatal error that's been occurring when a brand new site is previewed just after installing and activating the plugin I'm working on. The problem appears to be that the "...
1
vote
2answers
732 views

External Rewrite Rules

I'm trying to add a rewrite rule to Wordpress. I want to rewrite: "http://www.domain.com/plm_check/var_a/var_b/var_c/" to actually use a file from "http://www.domain.com/wp-content/plugins/plm/...
1
vote
1answer
86 views

Execute a function using ajax

I have a function called function getSingleAmazonProduct($asin=''). It returns an amazon product. I have a form field to enter the $asin. <div id="asinform"> <form id="...
1
vote
1answer
1k views

How to check if certain plugin exists and in expected version

I've created plugin that goes to wordpress plugin repositories. Now, I need to create another plugin (sub plugin or child plugin you may call) that require this certain plugin to be already installed ...
1
vote
2answers
518 views

Script won't load via plugin class

I'm not sure why this script is not loading or producing any load errors via Firebug. Here is my plugin script: class AV_Slideshow{ function __construct(){ $this->hooks(); } function hooks(){...
1
vote
3answers
1k views

How to make method from plugin available in theme?

Let's say this was in my plugin: class pluginslug_foo { public function bar() { //stuff } } and I wanted to make the method bar available for use outside of the plugin, for ...
1
vote
1answer
375 views

How to make my plugin theme-independent?

I need a little help and/or consulting for my next steps. (I'm a beginner!) I've been working on my plugin, using a Custom Post Type "Project", some help from the plugin "Advanced Custom Fields" - ...
1
vote
2answers
2k views

How to list the Hooks and order of execution in current loading page? [duplicate]

I need to know the list of hooks that are called in the current page . How to identify the priority assigned to the action and filters in the action . If i want to remove the default action on word-...
0
votes
1answer
299 views

How to add more than 1 user role to sub-menu pages

I create a plugin with 6 submenu pages. I need 4 of them to be accessible by administrator and a custom user role i created say 'coach' user. Then the 2 of them to be accessible by administrator and ...
0
votes
2answers
691 views

Possible to preset a widget's contents via a plugin script?

This plugin is a simple demo test to see if I can dynamically populate a pre-existing widget area with text. In this case, my theme has created the widget area "home-header-widget" and I'm trying to ...
0
votes
2answers
4k views

Set first image (external) as featured image / thumbnail

I've read through a lot of code snippets now and it seems like wether I'm to stupid or there is no solution for this. I have a setup where some information for a product is loaded via amazon API if I ...
0
votes
0answers
283 views

Activate Plugin which is in subfolder?

I try to activate the plugin inside the plugin folder is possible ? I am adding the absolute path of the plugin as something like I have a folder as main file and subfolder contain another plugin ...
0
votes
1answer
66 views

add_theme_support using a plugin

I want to create a theme specific plugin for the opern-sourced Bootstrap Genesis theme where I can use the add_theme_support function to add or remove several mini plugins or theme modules/features ...
0
votes
1answer
678 views

How to preset a sidebar widget with default content via script?

I'd like to add some code to my plugin populate a specific sidebar (if it exists) with a text widget containing preset content. Assuming that the sidebar I'm trying to preset is referenced by ID as "...
0
votes
2answers
2k views

Let user subscribe to specific categories

How could I let each user subscribe to a specific categories of his choice? I want to do something like reddit subscribe to categories? Is there any tutorial helps doing this?
5
votes
2answers
411 views

What is the difference between using global $current_screen and get_current_screen()?

I have been looking at get_current_screen();. I have seen there is also a global $current_screen; that I could use. Here are two examples: // Using function function wpse_post_notice() { $...
4
votes
2answers
4k views

Wordpress Update Plugin Hook/Action? Since 3.9

I've researched this a few times, yet my searching does not reveal much except custom code which may or may not be good WordPress practice. As of the latest releases (WordPress 3.9 "Smith"), has a ...
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
549 views

Problem requiring/including plug-in files with plugin_dir_path( __FILE__ )

I am trying to write a WordPress plug-in. In my project I have three PHP files. My plug-in file Widget for the plug-in Data installation I need to install data table on plug-in activation. For ...
3
votes
2answers
894 views

Re use authenticated HTTP connection or cUrl handle

We have a bespoke Wordpress plugin, which adds a meta box to the edit post page. The plugin accesses data from a semi-private HTTP REST API. The connection is authenticated (DIGEST) and accessed ...
3
votes
1answer
309 views

Using wp_cron with custom time interval and the register activation hook

Scenario 1: fails Adding a cron task wp_schedule_event with a custom interval on plugin activation using register_activation_hook outside the class definition fails to work because the custom ...
3
votes
1answer
357 views

Are shortcodes case-sensitive?

If I write a plugin and register a shortcode using this code: add_shortcode('footag', 'footag_func'); and a user uses this in their post: [FOOTAG] Is it supposed to work?
3
votes
1answer
452 views

Build path for a custom portfolio plugin

I'm finishing up a personal site that I've spent many weekends on. I've left one of the (potentially) most complicated parts to the end of production. I'm looking for some advice on how to proceed ...
3
votes
1answer
808 views

How to use the settings API to set multidimensional arrays

I'm writing a course information plugin. Most course info is related to to a post (a custom post type of 'course'), so I have put the majority of info in the postmeta table. But some info isn't ...
3
votes
1answer
6k views

How to Use Checkbox in Custom Option Page Using The Setting API

Can you please let me know how I can add a checkbox to Setting API in creating Custom Options Page? I am using the following code to add a txt box which is working perfectly but I am totally confused ...
3
votes
1answer
938 views

Error with Custom Admin Screen in iframe Thickbox

I have a plugin that adds a new admin screen in an iframe. I created a PHP file in my plugin, and I put a link with a class of Thickbox to that. Everything works just fine, but it produces a PHP error ...
3
votes
1answer
453 views

How Does Wordpress Uninclude/Deactivate A Plugin?

Wordpress uses the Observer Pattern for its plugin system and operates on the premise of checking if a plugin is activated, scanning the plugins directory and storing everything in an array in the ...
3
votes
1answer
443 views

Custom admin column disappearing when using Quick Edit [duplicate]

I have added a featured image column to my posts in the WP admin. This all works fine except when using the Quick Edit feature. Upon update, the column disappears, or rather isn't returned by the ajax ...
3
votes
2answers
5k views

Add a jQuery function to admin pages

I need to add a bit of document ready jQuery to post/page editors in admin. I'm hacking an old plugin that adds a text box to the editor page and handles inserting that text in a template file, but ...
3
votes
2answers
74 views

What is the added “complexity” of custom tables?

Wordpress Codex says: Think very carefully before adding a table because it adds complexity to your plugin that many users and site builders prefer to avoid. Why is it so? Adding more tables is ...