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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6
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1answer
3k views

Why does WordPress add 0 (zero) to an Ajax response?

Unless I end Ajax processing function by exit() or die(), the Ajax function receives desired and correct output but following by 0. Any idea why is that happening? Is that meant to be like that or ...
6
votes
4answers
1k 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
3answers
3k views

Change admin bar to default:off

While I quite like the admin bar I actually want it to be OFF by default instead of ON ( I don't want to disable it altogether because I want users to be able to turn it on if they want - but but I ...
6
votes
1answer
6k views

What is the “with_front” rewrite key?

I have the following line in a register_post_type function: 'rewrite' => array('slug' => 'Newsletters', 'with_front' => false), I understand what the line does in general (adds "...
6
votes
1answer
159 views

Understanding Wordpress functions' naming conventions

Many Wordpress functions follow naming conventions, probably the most well known of these would be the the_*() functions, such as the_post(), used in The Loop. Obviously the is_*() family of ...
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 ...
6
votes
4answers
3k views

Removing Metabox for “Slug” without removing functionality

Here is an interesting question. I have recently noticed that if you utilize the code remove_meta_box('slugdiv', 'post', 'normal'); you are actually unable to modify the slug when you click on ...
6
votes
4answers
6k views

Passing arguments to a admin menu page callback?

Situation: I'm working on a plugin and I'm developing it as a class, everything worked fine until I run into this situation. I wanted to make things a bit cleaner and tried this.. class MyPlugin { ...
6
votes
1answer
2k views

Set media upload attachment link to none and hide it in WP v3.5

In the Media upload popup page, how do I set the attachment link to none and hide it in Wordpress version 3.5? The following filter worked fine in earlier versions of WP: function ...
6
votes
1answer
156 views

Does hooking into the same action multiple times drain memory?

Currently I have three functions that run on pre_get_posts. I call them like this: add_action( 'pre_get_posts', 'private_groups' ); add_action( 'pre_get_posts', 'search_results' ); add_action( '...
6
votes
1answer
8k 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 ...
6
votes
1answer
3k views

Possible to search by author name with default WordPress search function?

I realize improving WordPress's search function is a huge can of worms, but the ONLY additional thing I need it to do is to show results when I search for an author's name. For example, if we have an ...
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 ...
6
votes
2answers
217 views

How do I use the WP image functions in a page template?

Wordpress has tons of mature code for image editing on the admin side, but I would like to provide a form inside of a custom page template for my visitors to drag and drop, crop and save a thumbnail ...
6
votes
1answer
222 views

Gettext details

I've got a few gettext() questions that are not covered anywhere in WordPress Codex but I think they are important. __('string') in THEME should be used for strings that are likely to be present ...
6
votes
2answers
1k views

Extract image from content and set it as the featured image

The problem: I'm posting from the Wordpress iPhone app. When adding an image, the image shows up in the description itself, which I don't like. What I'm trying to do: Remove the image from the ...
5
votes
5answers
12k views

How do I remove UL on wp_nav_menu?

I search on this site and found many answers for this question. Most of them is not working on my theme. Here is a one solution I found and it's working according to my need. function ...
5
votes
4answers
8k views

Get the blog page URL set in Options

I have set the blog to be a different page other than the home page. I want to have a link from single.php to this blog page. Is there any function that pulls out URL for the blog ?
5
votes
3answers
2k views

How many times can I hook into the same action?

I have a theme which includes some setup, using after_setup_theme but I'd like to write my own functions which also need to run after_setup_theme. I'd prefer to keep my stuff in a separate file. Can I ...
5
votes
4answers
63k 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
3answers
12k views

Link to user's profile settings page?

I'm trying to figure out how to link a logged-in user to his profile settings, but I can't seem to find a function that generates this link (like wp_settings_url() or wp_profile_url()) Is there a ...
5
votes
7answers
11k views

Include files in child theme functions file

Typically in my theme function file I'll require other files to keep things neat. require_once("foo.php"); Now working in a child theme I'd like to do that same. I'm adding custom admin options and ...
5
votes
4answers
685 views

Should I write a PHP function in home.php?

I am trying to learn WP Theme development. And as I have understod all "wp core" functions should be placed inside functions.php. But what about custom functions? Lets say I would need a simple ...
5
votes
2answers
11k views

Get the ID of the page a menu item links to?

I am currently using a custom walker to customize the output of wp_nav_menu(), and I am trying to add additional information to the <a> tags. What I want the output for each menu link to look ...
5
votes
3answers
7k views

Difference between the_permalink() and get_permalink() function

In WordPress I am using both the_permalink() and get_permalink() functions, but I cannot get any difference in the output of both functions. What is the difference between both functions?
5
votes
2answers
176 views

Is there a hook or function I can use to display all theme files being used on a current page?

Basically I want to be able to see the names of files on the front-end - not just templates e.g. category/page templates, but the actual theme files like header.php/sidebar.php/footer.php and so on. ...
5
votes
4answers
220 views

Does My Child-Theme Functions.php Need if{die} Security In It?

I'm new to PHP, but I've noticed just about every PHP file has a security snippet, "Die if not accessed in the correct manner" script at the beginning; my question, does a child-theme functions.php ...
5
votes
4answers
3k views

Is it possible to remove the “standard” post format?

I'm using post formats heavily on a project, but have no current need for the standard option. Beyond being an unnecessary bit of UI, it actually causes broken behavior if it does get mistakenly ...
5
votes
2answers
5k views

Manually set global $post vars with an ID, in order to use template tags

I have a function retrieving ID's of posts by very specific means. I need to be able to set the global $post in order to use functions like the_content(), which does not allow an ID as a parameter. ...
5
votes
1answer
264 views

How to get the image EXIF date/time and use it for the WP post date/time

I currently have the following working function. add_action('add_attachment', 'create_post_from_image'); function create_post_from_image($id) { if (wp_attachment_is_image($id)) { $image = ...
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', ...
5
votes
2answers
2k views

Modify Admin Bar Link

Starting on line 474 of /wp-includes/admin-bar.php there is a function that is declared as the following: function wp_admin_bar_new_content_menu( $wp_admin_bar ) What it does it generates the + New ...
5
votes
2answers
5k views

Function to execute when a post is moved to trash .

Hi is there an action which can be performed while a post is moved to trash .... I tried delete_post and deleted_post. It works but twice for each action ( before and after the action as written in ...
5
votes
3answers
2k views

How do I replace a function, declared inside a plugin's class, in functions.php?

I want to modify a function in a plugin. It is declared in the plugin's main file like this: class WCPGSK_Main { ... public function wcpgsk_email_after_order_table($order) { ... } } Add ...
5
votes
3answers
2k views

Plugin update error message

I'm working on a client website where the framework requires a specific plugin version to work properly. With the follow lines of code in my functions.php file, it stops the plugin from updating ...
5
votes
1answer
132 views

Automatic Logout on from another active session

I have a made application over Wordpress for premium user where user can see page after logging into his account. but there is issue that same user can login form multiple computer, so I want to make ...
5
votes
2answers
669 views

username_exists() function can't be access without logging in

I'm using the following function in functions.php to check if a username exists in the DB function check_username() { $username = $_POST['user']; if ( username_exists( $username ) ) { $...
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 ...
5
votes
2answers
100 views

syntax for remove_filter in parent theme with class

I'm trying to remove a filter on the register_url hook a parent theme added, that seems to have a class nomenclature I can't figure out. Ordinarily, a filter for this hook would be easily added like ...
5
votes
3answers
575 views

Displaying Custom Post Types In “At A Glance” Meta Box

I found the following snippet will displays the number of Custom Post Types published in Dashboard's At A Glance widget, like this: Is there a way to turn that "81 Wrestlers" text to a link to the ...
5
votes
1answer
1k views

how to group custom post types

hi wanted to know do i group my custom post types to appear together in a group in the wordpress back end menu bar like this below in the picture what code do i have to use in my functions.php so that ...
5
votes
3answers
380 views

Create “File-less” Page Template in Functions.php

(By "Page Template," I mean a theme file with the "Template Name" header that can be selected in the "Template" dropdown field on the page admin.) In multiple instances, I've built page templates ...
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 ???
5
votes
1answer
4k views

Using functions from a plugin in your theme

I am a beginner to wordpress (and to php for that matter). I am trying to understand some of the basics, and building a little e-commerce store using a plugin called "Jigoshop." I'm reading through ...
5
votes
1answer
32 views

Customizing subject in comment notification e-mails

How do you customize the following code in functions.php in order to have "New comment" as subject in comment notification e-mails instead of the default WordPress subject? function ...
5
votes
3answers
1k views

Dynamically add id to heading tags

How do I add an id attribute dynamically to every heading tag on a wordpress website using php? I wanted to make it so that for every heading tag (h1, h2, h3, h4, h5, h6) I have a unique id attached ...
5
votes
2answers
4k views

How can I get $id variable in widget's form function?

How can I get $id variable in widget's form function? According to widget's structure I see that widget function have $args as a parameter, which will be extracted in function's body. In my case i ...
5
votes
0answers
132 views

How to override a function when isn't at functions.php

I am trying to override a function for a theme in the child-theme but I can't get it to work. At functions.php on the theme I can see this require_once line: require_once("inc/alterna-functions.php");...
4
votes
3answers
14k views

How to add a data attribute to a WordPress menu item

I'm Twitter Bootstrap and need to add data-toggle="modal" attribute to the a tag of menu link. Upon searching most all results reference doing a walking for Twitter Bootstrap dropdown menus however ...
4
votes
4answers
386 views

One Child Functions.php for Multiple Child Themes

I have a wordpress setup that I use for clients with around 30 or so child themes that they can choose from. Each child theme has it's own functions.php file currently. Is it possible to setup just ...