The server-side programming language that the WordPress core, plugins and themes are written in.

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36
votes
5answers
20k views

What are PHP extensions and libraries WP needs and/or uses?

Codex loosely only mentions PHP version in server requirements, however PHP can be configured in pretty wide range of excluding/including different parts. What are extensions/libraries that: are ...
27
votes
6answers
4k views

Using OOP in themes

I see a lot of plugins making use of object-oriented coding when there isn't really necessary. But what's even worse is that theme developers are starting to do the same thing. Commercial themes and ...
20
votes
4answers
16k views

How to get WordPress Time Zone setting?

Can someone tell me how to get the time zone that is set in the WordPress Admin? For example, if the blog is set to Eastern time, I need this exact string to print out: US/Eastern This is for a ...
20
votes
5answers
2k views

Should all plugins be encapsulated in a Class?

When developing a plugin should the functions be grouped together into a Class to avoid namespace conflicts? Does using classes create performance overheads for PHP? If there is a performance hit, ...
15
votes
4answers
816 views

Why have <?php and ?> on every line

I've seen this convention pretty much everywhere, and, at times, it comes close to driving me nuts: <?php //The loop ?> <?php while ( have_posts() ) : the_post(); ?> <?php ...
15
votes
3answers
2k views

How exactly do automatic updates work?

I received an email this morning stating that my Wordpress site had been automatically updated to the latest version. I knew about the feature but I've always wondered exactly how it works. PHP isn't ...
14
votes
4answers
28k views

WP insert post PHP function and Custom Fields

The wordpress function is used for submitting data programatically. Standard fields to submit to incude the content, excerpt, title, date and many more. What there is no documentation for is how to ...
13
votes
1answer
25k views

Allow HTML in excerpt

Here is my excerpt code. // Generate custom excerpt length function wpbx_excerpt_length($length) { return 300; } add_filter('excerpt_length', 'wpbx_excerpt_length'); How do I allow html like ...
13
votes
3answers
11k views

Sending the reset password link programatically

I have this manually created page: $user_login = sanitize_text_field( $_GET['user_login'] ); if ( username_exists( $user_login ) || email_exists($user_login) ) { ?> <!--Everything has been ...
12
votes
6answers
50k views

How to retrieve the slug of current page?

I am trying to retrieve the slug of the current wordpress page outside the loop. The title of the page returns with wp_title () but how can I get the slug? <li><a ...
12
votes
1answer
3k views

How can I use WordPress functions in my stylesheet?

I have my style.php file looking like this. <?php header('Content-Type: text/css');?> #div{ background:<?php echo get_option('bgcolor');?>; } This does not work, but when I do ...
12
votes
4answers
8k views

User registration followed by automatic login

I am using a plugin modified for my purposes. What I am after is after the user has registered for it to automatically log them in and return them to the current page. At the moment it sends them an ...
12
votes
2answers
4k views

How to create custom 401, 403 and 500 error pages?

When a 404 error is encountered, a 404.php template file can be used to render a custom error message. This is documented in the Template Hierarchy article. My aim is to create custom error pages ...
11
votes
5answers
4k views

Inserting terms in an Hierarchical Taxonomy

I'm really having a few issues with inserting terms. Here is my scenario: I have a taxonomy called veda_release_type: //Release Type and Region $labels = array( 'name'=> ...
11
votes
4answers
21k views

How to manually fix the WordPress gallery code using PHP in functions.php?

It's been talked many times that Wordpress outputs some really bad code for the built-in gallery function. This is the core code responsible for the gallery output (in /wp-includes/media.php): ...
11
votes
1answer
236 views

Why isn't WordPress part of Framework Interop Group?

Are there any technical reasons that prevent WP to be part of Framework Interop Group?
11
votes
1answer
294 views

Are WordPress Heartbeat API 'beats' staggered or do they occur simultaneously for all users?

The WordPress Heartbeat API uses admin-ajax.php to run AJAX calls. If User X leaves their browser open, many calls will be made to the server, with each call happening when there is a 'beat'. Now if ...
11
votes
2answers
7k views

Getting only direct child pages in WordPress with get_pages

I am trying to fetch all direct children of a page. But I am getting all children and grand children as well. Any ideas? PHP Source: $args = array( 'child_of' => $post->ID, ...
11
votes
2answers
1k views

How to make a image-size selected by default in Media upload - WP v3.5

Bare with me. I want to have a custom image size selected by default in the Media upload popup page. In Wordpress v3.4.2 and prior, this elegant code worked fine: function ...
10
votes
9answers
5k views

Adding first / last CSS classes to menus

is that possible, without javascript hacks? like this: <ul class="my_menu"> <li class="first"> ... </li> <li> ... </li> <li> ... </li> <li ...
10
votes
1answer
745 views

How do I make an HTML table from a database table?

is there a built-in wordpress function to make the HTML or should I use plain-old PHP?
10
votes
1answer
423 views

Limit the number of inactive widgets

I'm trying to restrict the number of widgets from the "wp_inactive_widgets" sidebar to maximum 10, because the widgets admin page is incredibly slow: add_filter('pre_update_option_sidebars_widgets', ...
9
votes
1answer
3k views

Mega Menu Walker

I'm trying to create a mega menu walker. Unfortunately, walkers completely escape my coding knowledge. I could really use some help getting it working. Here's the features I need: Wrap the ...
8
votes
3answers
2k views

How to change the case of all post titles to “Title Case”

I am helping my father with his WordPress website. It has over 1,700 posts with TITLES IN UPPERCASE. We'd like to change these to "Title Case" in the database (possibly using this PHP script). The ...
8
votes
2answers
1k views

Can I use the same nonce for multiple requests on the same page?

Or does this break the purpose of the nonce, which I admint I don't quite understand it? :) For example on two ajax requests that run on page load, or when something is clicked: $.ajax({ type: ...
8
votes
3answers
2k views

What's the best way to use the Featured Image for responsive web design?

I have a brilliant idea and since WordPress already takes care of some of the work, I just need to find a good method to make this work. I am working on a project that needs to be responsive to all ...
8
votes
1answer
515 views

WordPress Themes and PHP unit

Is there any examples of using PHP unit tests with WordPress themes, seems a lot of blogs out there on the subject are out dated as the core unit tests are apart of trac, yet last night - I pulled ...
8
votes
1answer
7k views

How does printf( __( ) ); work?

Today I work through a theme to get a better understanding of WordPress and templating. I discovered this: <?php printf( __('Designed by %s', 'Anyword'), '<a ...
8
votes
3answers
441 views

Make Google index the entire post if it is separated into several pages

While this is a question, it is as well a serious warning to publishers that separate their posts using <!--nextpage-->. Bare with me. I run a highly trafficked multiple author platform that ...
7
votes
4answers
4k views

the_date() not working

I am using wordpress 3.2 and I did a query post like this: <?php query_posts("posts_per_page=1post=type&page=post_parent=10");?> Then I try to echo out the date of this post I queried ...
7
votes
4answers
7k views

Converting timestamps to local time with date_l18n()

I've got a WordPress cron job that sends an email periodically and saves the timestamp when it was sent as an option, and I'd like to display a date on a settings page. Something like, "The last ...
7
votes
6answers
3k views

Where to store PHP files created by plugin / themes

There are cases in which a plugin or theme needs to create a php file somewhere that can later include it. For example a captcha plugin, or some kind of a templating system like twig/smarty (In my ...
7
votes
1answer
3k views

How can I fetch loop of post titles via AJAX?

I have a list of the most recent post titles in sidebar.php. Here is an example of how that code looks: <?php $args = array('posts_per_page' => 20); ?> <?php $sidebar = new ...
7
votes
2answers
1k views

What is the correct way to build a widget using OOP

I am working on a simple search form widget, with a built in autocomplete capability (You can download the current version here). The plugin is working, but I am currently rewriting all the code using ...
7
votes
1answer
3k views

Contact form redirecting to page not found on send

I have a contact form that I used lot's of times before on other non WP sites but it doesn't seem to work on my current WP site, it just redirects you to a page not found. I don't want to use any ...
7
votes
2answers
2k views

Remove “Insert from URL” link in Media upload - WP 3.5

How do I remove the Insert from URL link in the new Wordpress 3.5 Add Media popup page? In earlier versions of Wordpress, this worked fine: // removes URL tab in image upload for post function ...
7
votes
2answers
4k views

Any guides on creating custom admin pages?

I basically want to create a table (preferably AJAXified) that lets the user enter a line of information, and be able to add new lines of information, and delete selected ones. I've found this post ...
7
votes
3answers
798 views

Adding custom input for data attribute in insert media modal

I'm trying to add a text input to the "Insert Media" modal in the hopes of being able to add an html5 data- attribute to the images' parent anchor. <a class="fancybox" href="..." ...
7
votes
4answers
3k views

Wordpress and magic quotes

I've been writing some Wordpress plugins, and I've been having some problem with Wordpress putting magic quotes on POST and GET data. Specifically, the "wp_magic_quotes" function in ...
6
votes
4answers
353 views

Cleaning up WordPress to improve performance?

Looking over the current WordPress codebase it's clear that functions are over-used. My count is over 8,100 functions/methods are defined inside the WordPress codebase. That is terrible, and a ...
6
votes
4answers
938 views

Apply class to every paragraph that holds image?

When adding an image to a page or post, Wordpress is automatically adding a paragraph tag <p> as parent holding the image. Like so: <p><img src="my-image.jpg" alt=""></p> ...
6
votes
6answers
1k views

Is there a way to use the Wordpress users but without loading the entire Wordpress core?

I have a Wordpress site and a web application that can be used only by the registered (Wordpress) users. Now I'm loading wp-blog-header.php to check if the user is logged in. Everything is working ...
6
votes
4answers
4k views

Only get_posts of certain post formats

I'm trying to create a archive list with only my "normal" post format articles (not link, aside, quote, etc formats). How would I implement has_post_format( 'standard' ), or something similar, into ...
6
votes
2answers
2k views

Confirmation box when submitting post for review

A very common issue that I experience with new authors is that they forget to complete a few essential tasks prior to submitting their post for review (even though I have a guide available for them). ...
6
votes
2answers
374 views

Why do you need to wrap a function inside array($this, function)

I'm a newbie at PHP and wordpress so please be gentle! I'm building a plugin - following a few tutorials, getting it all working. My question is why is the function I want to call wrapped up in the ...
6
votes
1answer
5k views

How to include checkbox in widget backend form?

I'm trying to include a checkbox in my widget back end. But I cannot get the value (on or off) after the user submits it. I thought the value would be stored in "esc_attr( $check )" (as it is when ...
6
votes
2answers
2k views

PHP unit testing WordPress?

Given how WordPress is written and how it interacts with a database and given how its not very much OOP oriented, is there a way to unit test a theme? is there a way unit test a framework (not a theme ...
6
votes
1answer
8k views

How do I use WP_query with multiple post IDs?

I want to query multiple posts with an array of IDs (note: I am querying a custom post type). Here's what I have, which isn't working: $myarray = array('144', '246'); $args = array( 'post_type' ...
6
votes
4answers
719 views

How do you code for WordPress?

In plain php and frameworks coding is done with the help of IDE tools, im using PhpStorm and very happy so far, recently i decided to discover most popular CMS this days and got confused how do you ...
6
votes
1answer
246 views

Inject post (from specific category) between posts in Loop

I would like to add a post (from specific category) between posts in the WordPress Loop (such as 'Sponsors'). Example: P P P S P P S P P S P P How can I achieve this? I am a beginner with coding, so ...