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442
votes
7answers
170k views

When should you use WP_Query vs query_posts() vs get_posts()?

It seems like half the tutorials in the Codex and around the blogosphere use query_posts() and half use WP_Query. They all do similar things, so when should I use one over the others?
339
votes
108answers
162k views

Best collection of code for your 'functions.php' file [closed]

As with many others who are now viewing this post, I have been reading various blogs, forums, and discussion groups to learn and improve my WordPress skills. Over the past 12 months I have been on a ...
211
votes
27answers
59k views

How to: Easily Move a WordPress Install from Development to Production?

I do development on one box and use a second for production. Right now I just dump the database and then do a find a replace for the URL changes; then copy over the files and import the new SQL. Are ...
173
votes
5answers
179k views

When to use WP_query(), query_posts() and pre_get_posts

I read @nacin's You don't know Query yesterday and was sent down a bit of a querying rabbit hole. Before yesterday, I was (wrongly) using query_posts() for all my querying needs. Now I'm a little bit ...
164
votes
5answers
444k views

Get WordPress post content by post id

How can I get WordPress post content by post id?
148
votes
13answers
54k views

Hide the fact a site is using WordPress?

I have a website for which we are trying to be discreet about the fact that we are using WordPress. What steps can we take to make it less obvious? EDIT- Important security note: Please understand ...
145
votes
9answers
65k views

Is moving wp-config outside the web root really beneficial?

One of the most common security best practices these days seems to be moving wp-config.php one directory higher than the vhost's document root. I've never really found a good explanation for that, but ...
141
votes
9answers
23k views

Tips for using WordPress as a CMS? [closed]

I want to use WordPress as a CMS for a reasonably basic site rather than a blog. I have several pages and at the moment, I don't intend to have a "news" page. While there are ways to make this work, ...
140
votes
7answers
62k views

Disable emojicons introduced with WP 4.2

So WP 4.2 introduced emojis (smileys) that basically adds JS and other junk all over your pages. Something some people may find shocking. How does one completely erase all instances of this?
138
votes
5answers
125k views

How to fix pagination for custom loops?

I have added a custom/secondary query to a template file/custom page template; how can I make WordPress use my custom query for pagination, instead of using the main query loop's pagination? Addendum ...
137
votes
37answers
17k views

Objective Best Practices for Plugin Development? [closed]

Starting a community wiki to collect up objective best practices for plugin development. This question was inspired by @EAMann's comments on wp-hackers. The idea is to collaborate on what objective ...
135
votes
5answers
310k views

If the current user is an administrator or editor

How can I check to see if the current logged-in user is an administrator or an editor? I know how to do each individually: <?php if(current_user_can('editor')) { ?> <!-- Stuff here for ...
132
votes
14answers
95k views

Adding a Taxonomy Filter to Admin List for a Custom Post Type?

I have created a Custom Post Type called 'listing' and added a Custom Taxonomy called 'businesses'. I would like to add a dropdown list of Businesses to the admin list for the Listings. Here is what ...
132
votes
7answers
181k views

Is it possible to get a page link from its slug?

Is it possible to get a page's permalink from the slug alone? I'm aware that you can get the page's permalink from the ID using get_page_link(): <a href="<?php echo get_page_link(40); ?>">...
122
votes
6answers
309k views

How do test if a post is a custom post type?

I am looking for a way to test if a post is a custom post type. For example, in, say, the sidebar I can put in code like this: if ( is_single() ) { // Code here } I want code testing for only ...
122
votes
7answers
35k views

Updates for a private plugin?

If I write a private plugin, is there any way to use the WordPress auto-update mechanism to update it? I want to encapsulate the functionality, but it's specific to my own 5 or so blogs, so it's not ...
120
votes
11answers
424k views

How do I retrieve the slug of the 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 href="/slug-of-current-...
118
votes
4answers
204k views

How to display SQL query that ran in query?

I have come across a function before that displayed the exact SQL code that was used. In a loop for example, but can't remember. Can anybody tell me that function?
112
votes
10answers
45k views

Display a portion/ branch of the menu tree using wp_nav_menu()

I have a menu defined in WP Admin that looks like this: I want to be able to display all the child links on the sidebar whenever I am at a parent page. For example, if the user is on my "About Us" ...
111
votes
4answers
104k views

Menu items description? Custom Walker for wp_nav_menu()

Normal Wordpress Menu looks like: Home | Blog | About us | Contact But I've seen many pages with descriptions under these links: Home Page | Our Blogs | About us | Contact ...
110
votes
12answers
16k views

Verifying that I have fully removed a WordPress hack?

My for-fun WordPress blog at http://fakeplasticrock.com (running WordPress 3.1.1) got hacked -- it was showing an <iframe> on every page like so: <iframe src="http://evilsite.com/go/1">&...
109
votes
4answers
89k views

add_menu_page() with different name for first submenu item

The add_menu_page documentation says to pass the menu title as the second parameter: add_menu_page('Page Title', 'Menu Title', ...); When adding more pages later via add_submenu_page, the main page ...
105
votes
8answers
71k views

Organizing Code in your WordPress Theme's functions.php File?

The more customization I make to WordPress the more I start thinking about if I should be organizing this file or splitting it up. More specifically, if I have a bunch of custom functions which only ...
105
votes
2answers
56k views

Uninstall, Activate, Deactivate a plugin: typical features & how-to

I'm making a WordPress plugin. What are typical things I should include in the uninstall feature? For example, should I delete any tables I created in the install function? Do I clean up my option ...
102
votes
6answers
142k views

Using wpdb to connect to a separate database

I want to connect wpdb to another database. How do I create the instance and pass it the database name/username/password? Thanks
98
votes
5answers
61k views

Best way to initiate a class in a WP plugin?

I've created a plugin, and of course being me, I wanted to go with a nice OO approach. Now what I've been doing is to create this class and then just below create an instance of this class: class ...
97
votes
6answers
16k views

Where to put my code: plugin or functions.php?

Is there an easy to understand scheme to decide what kind of code belongs to a plugin or the theme’s functions.php? There are many cases and many debates about that topic, mostly because there are ...
96
votes
7answers
65k views

Get rid of Another update is currently in progress

I was trying to update my wordpress core to 4.5.1 but my system was missing some permissions, and now after giving correct permission, I cannot get rid of that message and I cannot upgrade. Tried to ...
96
votes
4answers
70k views

How to Protect Uploads, if User is not Logged In?

I use WordPress for a private site where users upload files. I use the "Private WordPress" to prevent access in to the site if the user is not logged in. I would like to do the same to the files ...
92
votes
12answers
334k views

How to get URL of current page displayed?

I want to add custom PHP code to ensure that whenever a page on my site loads in my browser, the URL of that page is echoed to the screen. I can use echo get_permalink(), but that does not work on ...
89
votes
11answers
116k 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 ...
86
votes
3answers
37k views

Between functions.php (theme), widgets, and plugins, which is loaded first?

Customer asks if a specific carousel plugin he uses can be widgetized. That means I should create a widget inside functions.php which calls the plugin's function. That means that the plugin's code has ...
86
votes
1answer
123k views

How to edit a user profile on the front end?

How can I edit a user profile in the front end with a form? first name, last name, username, email address and password
85
votes
15answers
7k views

Steps to optimize WordPress in regard to server load and website speed?

Besides installing W3 Total Cache or another caching plugin what steps can I take to make sure that my theme and site run as fast as possible.
83
votes
6answers
204k views

How to check if a user is in a specific role?

I have a pretty specific requirement to show different text in a field label on the user profile page based on the current user's role. I can't seem to figure out how to check whether the current use ...
81
votes
3answers
27k views

Autoloading & Namespaces in WordPress Plugins & Themes: Can it Work?

Has anyone used autoloading and/or PHP namespaces within a plugin or theme? Thoughts on using them? Any harm? Pitfalls? Note: namespaces are PHP 5.3+ only. Assume, for this question, that you know ...
78
votes
11answers
9k views

WordPress frameworks and parent themes [closed]

By now there is a considerable amount of WordPress code around that is meant to be re-used by other developers. Unfortunately there is little to none practical and solid information on it and ...
77
votes
6answers
116k views

What's the difference between home_url() and site_url()

My understanding is that site_url() returns the location where the WordPress core files are. If my blog is hosted at http://example.com/blog then site_url() returns http://example.com/blog But then ...
76
votes
4answers
96k views

Create custom page templates with plugins?

Is it possible to make custom page templates available from a plugin?
76
votes
12answers
77k views

Can I rename the wp-admin folder?

Is it possible to rename the wp-admin folder? I know I could just rename it, but unless it's supported by the code lots of things would break. If I use a custom folder name, it will make it slightly ...
75
votes
18answers
6k views

WPSE Plugin Repository: The plugins that came out of WP-Answers

Link your WPSE-Plugins If you answered a question and made a plugin out of your code, than this is your place to share it. The Idea: An old comment from @MikeSchinkel during the beta phase where he ...
74
votes
27answers
12k views

Software for WordPress Theme and Plugin Development? [closed]

What software do you use for your WordPress related needs? Please state your OS. On windows XP I use: filezilla (FTP) notepad++ (for reading of PHP / CSS files) firebug (a firefox extension to ...
74
votes
10answers
51k views

Enqueue Scripts / Styles when shortcode is present

What is the idea way to register/enqueue scripts and/or styles for use in plugins? I recently made a plugin simple plugin to add the user avatar/gravatar with a shortcode. I have different style ...
74
votes
3answers
49k views

When to use is_home() vs is_front_page()?

I've found that is_front_page appears to return true when I'm viewing the home page and have a single sticky post assigned there. It also returns true when I've assigned a page as the static front ...
72
votes
10answers
114k views

Remove “Category:”, “Tag:”, “Author:” from the_archive_title

I have the following code in my theme's archive.php: <?php the_archive_title( '<h1 class="page-title">', '</h1>' ); ?> This gives me titles like "Category: Russia", "Tag: America", ...
72
votes
4answers
32k views

What is the preferred way to add custom javascript files to the site?

I've already added my scripts, but I wanted to know the preferred way. I just put a <script> tag directly in the header.php of my template. Is there a preferred method of inserting external or ...
71
votes
13answers
102k views

Passing a variable to get_template_part

The WP Codex says to do this: // You wish to make $my_var available to the template part at `content-part.php` set_query_var( 'my_var', $my_var ); get_template_part( 'content', 'part' ); But how do ...
70
votes
8answers
78k views

WordPress wp-admin https redirect loop

I am using nginx as my webserver and i have edited the configuration file to point to https, so i change the WordPress url settings to https and also added the WordPress force ssl admin code to my wp-...
70
votes
8answers
157k views

How to include PHP files in plugins the correct way

My problem is when on the main plugin file I include a PHP file something like this: include(WP_PLUGIN_URL . '/wordpress-group-buying/ipn/paypal-ipn.php'); // or include_once(WP_PLUGIN_URL . '/...
69
votes
9answers
121k views

Get name of the current template file

I've found this to display the current name of the file used in template: function get_template_name () { foreach ( debug_backtrace() as $called_file ) { foreach ( $called_file as $index )...

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