A function is a sequence of program instructions that perform a specific task. It is packaged as a unit that can be used wherever the according task should be performed.

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19
votes
3answers
5k views

Where do I put the code snippets I found here or somewhere else on the web?

Many posts here or somewhere else contain code, but they do not say where to put it. Example: I have found this post: How do I turn off 301 redirecting posts (not canonical)? I'm a newbie with PHP. ...
267
votes
108answers
134k views

Best Collection of Code for your functions.php file [closed]

Please vote on the question and any answers you find useful by clicking on the UP arrow on the left hand side of the question or answer. As with many others who are now viewing this post, I have been ...
42
votes
2answers
11k views

Between functions.php, 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 ...
4
votes
2answers
7k views

paginate_links() don't properly work in search.php?

I'm using this in my search.php template … <div class="pagination"> <?php echo get_pagination_links(); ?> </div> And this is the function … function get_pagination_links() { ...
7
votes
2answers
1k views

Use AJAX in shortcode

I have the following code to the shortcode to display a random quote. Question: how to make a button display a new random quote? I mean, that would hit the button and show you a new quote (without ...
11
votes
5answers
7k views

How to use a custom post type archive as front page?

I'd like to use a custom post type archive as a site's front page, so that http://the_site.com/ is a custom post type archive displayed according to my archive-{post-type}.php file. Ideally I ...
2
votes
2answers
9k views

Proper use of Output Buffer

I'm attempting to use actions to override function calls I currently have throughout a template (to make updating certain replicated sections easier). For example, in archives.php I have the following:...
18
votes
1answer
12k views

How to override parent functions in child themes?

I've been reading around and trying to figure out how to do this, but for some reason I can't seem to override parent functions in my child theme. I'm using TwentyTen as a parent - can anyone tell me ...
5
votes
1answer
3k views

Set JPEG compression for specific custom image sizes

I use various custom image sizes (by add_image_size) and I have set my JPEG compression to 30% with this filter: function jpeg_quality_callback($arg) { return (int)30; } add_filter('jpeg_quality', ...
29
votes
5answers
37k 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. So, if my blog is hosted at http://example.com/blog then site_url() returns http://example.com/blog But ...
26
votes
8answers
64k 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 . '/...
12
votes
4answers
23k 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): ...
14
votes
5answers
1k views

Best way of passing PHP variable between partials?

I have a variable in header.php, such as: $page_extra_title = get_post_meta($this_page->ID, "_theme_extra_title", true); Once I do: var_dump($page_extra_title); I always get NULL outside of ...
3
votes
1answer
2k views

Check if post is being published for the first time, or is an already published post being updated

I am building an add-on to an events module that checks for availability, since there wasn't a function for that in that module. Now that I have built the logic, there are three emails I will need to ...
6
votes
2answers
6k views

Upload Multiple Files With media_handle_upload

I have a WordPress form plugin and I use media_handle_upload to upload the files and get there ids directly and attached its ids to the post as a meta date, I used the following to did that: The HTML ...
3
votes
5answers
9k views

Why isn't is_page working when I put it in the functions.php file?

I have page called "Apple", the page's ID id 2533. In page.php file I have line: echo $bannerimg And this function in functions.php: if ( is_page( '2533' ) ) { // also tested with 'Apple'...
0
votes
1answer
3k views

How to redirect users to custom lostpassword page?

How to redirect users to custom lostpassword page when they click on the Error: Lost your password?. Because I set a redirect for wp-login.php to my custom login page. when a user click on Error: Lost ...
0
votes
2answers
801 views

Override parent theme function that is not hooked or in the functions.php file

I need to remove a function from the parent theme and replace it within the child theme. The function is called print_meta($meta_box). The function is not pluggable and it located in a random file, ...
12
votes
1answer
6k views

Solution to render Shortcodes in Admin Editor

I have asked this question about a year ago and I am hoping there is some type of simple solution which will allow me achieve my objective. So here it goes: I often utilize shortcodes within the ...
3
votes
1answer
10k views

Custom page with variables in url. Nice url with add_rewrite_rule

Using WP3.1 I Have a custom page with a WP_Query and the query gets dynamic variables from the url. And i want safe variables and clean urls. Example: carpage/?carmodel=honda&location=...
3
votes
2answers
900 views

Modify CSS via Theme Control Panel

Hi to all I'm trying to create an advanced control panel for my first Wordpress template but I'm not able to add a function that I will need. The function that I'm trying to add is the possibility to ...
2
votes
1answer
4k views

Set posts of a custom post type to be private by default?

Say I created a custom post type called 'Private Posts' ($post_type = itsme_private_posts) and want all posts under the custom post type to be set to 'Private' automatically when published i.e. by ...
1
vote
6answers
8k views

How to style current page number (wp_link_pages)?

When a post is split on more pages TwentyTen theme use the native function wp_link_pages to display a navigation page bar at the end of post. I am trying to style those elements for my theme, but ...
7
votes
2answers
847 views

Remove Actions/Filters added via Anonymous Functions

That's a freaking bad practice I must say. Spent last two hours finding a solution to remove actions and filters added via Anonymous functions. This is the code used on a Parent Theme, and I need ...
3
votes
2answers
4k views

Wordpress 3.1 - How does one add sticky post capabilities to post types

In wordpress 3.1 they finally added the option of allowing posts belonging to a custom post type to be marked as "sticky"... what I can't figure out though is how to enable this so the admin menu ...
1
vote
2answers
448 views

How to activate “Description” metabox for menu item programmatically?

I'm creating custom wordpress theme. How can I enable "Description" metabox for menu items (on nav-menu page) by default programmatically?
1
vote
2answers
3k views

class=“parent” for wp_list_pages?

<div class="menu"> <ul> <?php wp_list_pages('exclude=&title_li='); ?> </ul> </div> creates the following output... <div class="menu"> <...
1
vote
1answer
179 views

disable comments if array exists

This is the code which is registering the function for rewrite_endpoints(): function wpa121567_rewrite_endpoints(){ add_rewrite_endpoint( 'comments', EP_PERMALINK ); add_rewrite_endpoint( 'stats', ...
1
vote
2answers
5k views

Is it possible to disable a function of a parent theme?

I was wondering whether it is possible to completely disable a function that is called in a parent theme's functions.php and if so, how? (Of course without deleting the function. Rather by adding ...
0
votes
1answer
158 views

Adding New Role

I have add new role in functions.php file by this code: // Add a custom user role $result = add_role( 'supplier_for_planvent', __( 'Supplier_For_Planavent' ), array( 'read' => true, // true ...
29
votes
4answers
45k views

Changing Admin Menu Labels

I have spent the last day using the functions.php file to fully customize WordPress for my client sites. I am amazed at how much I have been able to accomplish and how much easier it will make things ...
14
votes
1answer
16k views

Redeclare/Change Slug of a Plugin's Custom Post Type

Is it possible to redeclare/change the slug of a plugin's existing custom post type (without simply editing the plugin)? That is, if Plugin X creates a custom post type with the slug /uncookedtoast/, ...
9
votes
2answers
9k views

How to change default position of WP meta boxes?

Im wondering if there is a way to change the default position of Wordpresses meta boxes such as "featured image" for custom post types without having to drag them manually? Example:
6
votes
2answers
2k views

How to add a custom metabox to the Menu Management admin screen?

Although I am very thankful to the wordpress core team that they have finally integrated native menu management capabilities I get frustrated with some key elements which I would like to change. I ...
22
votes
7answers
32k views

remove empty paragraphs from the_content?

Hey guys, I simply want to prevent the creation of empty paragraphs in my wordpress post. That happens quite often when trying to manually space content. I don't know why this doesn't take effect? /*...
6
votes
4answers
66k views

How to set and use global variables? Or why not to use them at all

UPDATE: My original question has been solved, but this is turning into a valid discussion about why not to use global variables, so I am updating the question to reflect that. The solution was <?...
5
votes
2answers
1k views

Prevent publishing the post before setting a featured image?

As the title says , I want a plugin/function to prevent/inform the user when he tries to publish the post without setting the featured image. ANY HELP ???
4
votes
1answer
7k views

How to create thumbnails for PDF uploads?

I'm developing a website that needs to allow users, within Gravity Forms, to submit a PDF file and have a JPG thumbnail created of the first page of the PDF that is then displayed in the created post. ...
16
votes
4answers
17k views

How to customize the_archive_title()?

In my child theme's archive.php, I have the following code for displaying the title of my archive pages: <?php the_archive_title( '<h1 class="page-title">', '</h1>' ); ?...
7
votes
1answer
191 views

Shared functionality in plugins and themes

I recently started to develop plugins and themes and I found that I need to use several functions of on both. Sometime I think about to check if function / class exist before declared as said on this ...
3
votes
3answers
4k views

Add new “Insert Into Post” button with another function

Problem: Add a hook that automatically adds a short tag to video attachments when inserted from the Media Library (video) tab: Update: This works under the 'Media Library' tab — and doesn't break ...
5
votes
2answers
8k views

Add custom template page programmatically

I'm trying to add template page from a plugin,and my template page is in this plugin folder.Is this posible?Here is my code: global $user_ID; $new_post = array( 'post_title' => 'Test ...
3
votes
1answer
2k views

Is it possible to use a forgot password url filter?

i recently found that a login url filter is available but i can't find a solution for the forgot password as well, for the login url i use this: function custom_login_url($login_url) { return ''....
3
votes
1answer
307 views

expire wordpress user posts

I'm trying to make classified WordPress theme and I need to make users posts expire date plus show that date into the post. Users only allowed to publish their posts in post-types not as ordinary ...
2
votes
3answers
1k views

How to add .htaccess code through a function?

I need to add the following .htaccess code through a function <IfModule mod_deflate.c> # Insert filters AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html ...
2
votes
2answers
302 views

Delete expired posts after a number of days after they expired

I use the below code to delete custom posts with status 'expired' (thanks to Jamie Keefer). Posts are set as 'expired' by a 3rd party plugin. Users have only a frontend access to their posts (adverts)....
1
vote
1answer
607 views

Enqueue Javascript Correctly for 3.5

I am trying to create tabs for admin settings page in wp, but I think I'm doing it wrong. The example below shows how I did it but I don't know how to change this to use it correctly with no conflict ...
0
votes
2answers
2k views

Stripping shortcode from custom excerpt function

I'm using the following function to create a custom excerpt for my homepage and categories pages so I can do it by character count and have a custom "read more". However, I have captions shortcode ...
4
votes
1answer
609 views

Can I turn off write-in tags/taxonomies?

One of the big problems my site staff has had with tags is the overwhelming number of similar or duplicate tags, due to the write-in ability. I'm about to add new custom taxonomies to my site for ...
3
votes
1answer
3k views

Edit tag cloud widget number

By default, the WordPress tag cloud widget has a set amount of 45 tags to display. This can be seen in the wp-includes/category-template.php file. By default, the WooCommerce plugin which I have ...