Questions tagged [functions]

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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36 votes
4 answers
9k 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. ...
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  • 361
344 votes
108 answers
165k 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 ...
92 votes
3 answers
40k 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 ...
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  • 2,700
3 votes
3 answers
2k views

override parent theme configuration in child functions.php

Hope someone can help, am looking for some suggestions on how to override/replace some functions that are loading in a parent theme and move them into the child theme so we can make alterations to the ...
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  • 31
18 votes
5 answers
18k 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 ...
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31 votes
1 answer
17k 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 ...
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  • 1,410
9 votes
2 answers
6k 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 ...
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6 votes
2 answers
20k 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:...
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  • 1,873
6 votes
2 answers
20k 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() { ...
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78 votes
11 answers
130k 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", ...
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  • 883
49 votes
6 answers
110k 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>' ); ?&...
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  • 593
77 votes
9 answers
169k 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 . '/...
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  • 66.5k
17 votes
4 answers
30k 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): ...
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  • 4,461
8 votes
1 answer
8k views

Sort search results by post type

I need to sort my search results by custom post type. the problem: the order is custom. I do have 5 different post types and i got the order like so: artist artwork page post publication I'd like ...
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  • 1,239
49 votes
5 answers
74k views

How can you check if you are in a particular page in the WP Admin section? For example how can I check if I am in the Users > Your Profile page?

I'm building a plugin and I want to add bits of javascript in the admin head but only for certain admin pages. I don't mean pages as in a WordPress page that you create yourself but rather existing ...
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  • 1,395
9 votes
1 answer
5k 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', ...
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3 votes
4 answers
42k views

ajax live search for post title

i m creating a AJAX live search to filter posts title in my wordpress theme. As i write something in input it show all the post in result, Not filtering it to get custom post.. How to search live ...
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  • 131
49 votes
5 answers
87k 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 ...
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  • 555
86 votes
6 answers
135k 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 ...
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  • 985
43 votes
4 answers
243k 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 <?...
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  • 1,198
32 votes
3 answers
56k 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/, ...
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  • 445
8 votes
2 answers
8k 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 ...
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  • 93
19 votes
12 answers
57k views

Remove type attribute from script and style tags added by WordPress

Warning: The type attribute is unnecessary for JavaScript resources. From line 10, column 146; to line 10, column 176 feed/" /> <script type="text/javascript">window ...
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12 votes
2 answers
49k views

Adding a second email address to a completed order in WooCommerce [closed]

Before I ask this question, I know there is a (legitimate) hesitation to answer questions here about Woo products since they have their own support and their users should be encouraged to use that. I ...
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  • 239
8 votes
1 answer
17k 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=...
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  • 179
7 votes
3 answers
14k 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 ...
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  • 4,461
13 votes
4 answers
5k 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 ...
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  • 2,615
7 votes
3 answers
22k 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 ...
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  • 802
14 votes
8 answers
39k 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' ...
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  • 4,921
9 votes
1 answer
1k views

Is it ok to use a function to output the text domain name in a wordpress theme

I am working on a theme and I want to make it available for translating. I have not been including a text domain on translated text because I don't know what the text domain is going to be yet. I ...
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1 vote
2 answers
2k 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, ...
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  • 606
22 votes
3 answers
18k 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 ...
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16 votes
5 answers
40k 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 ...
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  • 263
14 votes
9 answers
35k views

Adding fields to the "Add New User" screen in the dashboard

I'd like to add the field "Company Name" to the add new user page in the admin panel. I've done quite a bit of searching and have been unable to find details on how to do this. I can easily add info ...
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17 votes
5 answers
6k 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 ...
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  • 4,921
8 votes
1 answer
10k views

remove links from images using functions.php

I am looking for a way to remove the attachment link from images in the post content. I would like to add this to the functions.php in my theme. I know you can disable this in the post on a per ...
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4 votes
2 answers
5k 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)....
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  • 1,081
4 votes
1 answer
11k views

Apply custom role capabilities to administrator (without plugin)

I have a custom role that allows access to only a sigle custom post type. This is all well and good, but now it is only showing up for this role, not for admin and super admin. I'm having a hard time ...
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3 votes
2 answers
1k 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 ...
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2 votes
3 answers
3k 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 ...
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  • 389
1 vote
6 answers
13k 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 ...
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  • 1,391
7 votes
4 answers
8k views

Gutenberg disallow certain custom blocks but keep all core blocks?

I'm writing a function to allow only some custom blocks - essentially I want to register all the blocks, then based on a database table of 'selected' blocks disallow any other custom block. I can ...
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  • 545
1 vote
2 answers
5k views

Counting number of posts in a category and its sub categories and displaying result using shortcode

I am trying to create a shortcode to display the posts count in a category. I have successfully done this using this code: // Add Shortcode to show posts count inside a category function ...
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1 vote
2 answers
5k views

Shortcode display outside the div

I have created a shortcode that retrives and displays a form.The content of the attribute in HTML. function check_my_login( $atts) { return '<form action="" name="" method="post" ...
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3 votes
2 answers
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 ...
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2 votes
5 answers
7k views

Remove Page Title from Static Frontpage

I'd like to remove the post title from my static frontpage. Just that page. I've created a child theme from a free Press75 theme. So I'd like to make this change in my child theme's function.php. I ...
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2 votes
2 answers
828 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?
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1 vote
2 answers
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"> <...
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8 votes
3 answers
6k views

start_lvl Ignored in Custom walker_nav_menu

This is my first project involving WordPress and I've got stuck trying to create a custom walker for a footer menu. I basically want to change the menu from the <ul> <li></li> </...
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  • 81
5 votes
2 answers
4k views

hook a functions to change wp-config from functions.php

is there a way to hook / filter or add action that would be printed in the wp-config file? lets say i want to add some simple command like "empty the trash" aka define('EMPTY_TRASH_DAYS', 1 ); This ...
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