Questions tagged [globals]

In PHP globals are variables that are available for every function. WordPress core defines several handfulls of global variables, such as `$post` and `wp_query`.

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4
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2answers
455 views

Why declare $post globally?

I'm new to Wordpress development and am seeing examples everywhere that have a line to declare the $post variable explicitly via: global $post; But I've tested my uses without that line and it makes ...
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1answer
1k views

how to get the post id in plugin

I have a plugin that I'm working on and I'm having trouble getting the post id so jquery can use it. I'm able to get it using the admin_head hook but I'm not sure how I can return it to jquery. I'm ...
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0answers
90 views

Sessions in plugin development?

I'm developing a plugin. At present I have two files. dotmailer.php and dotmailer-add.php. I'm creating a newsletter widget. My dotmailer.php plugin adds an admin menu, with options. It allows the ...
0
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1answer
730 views

Access post ID in “content_save_pre”

First time poster, pardon my mistakes. I am trying to use the content_save_pre filter to grab a URL in the first line of a post and save it into a custom meta, and also set the post format as a link. ...
2
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1answer
2k views

How to access global $wp_meta_boxes variable on front-end?

Is there a way to take the global $wp_meta_boxes variable to be used in the front-end? Currently the $wp_meta_boxes is accessible on specific admin pages only. I've found a similar question about ...
9
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1answer
17k views

Passing variables from header.php to template and vice verca

I've defined a variable - let's call it $header_var, which is placed in the header.php file. I would like this variable to be passed onto my template file (in this case taxonomy.php). Also I would ...
1
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1answer
506 views

store custom WP table names in a global variable

I was being creative and put this in one of the files loaded with my plugin. Are there implications with storing the table names this way? global $wpdb; if(!defined('DB_ARTISTS')) define('...
0
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0answers
14 views

setting global and using as argument [duplicate]

I've set a global variable in functions.php like so: $cat_args = array('cat1', 'cat2', 'cat3'); and tried to use it in a template file: global $cat_args; if is_cat($args): //do stuff endif; The ...
1
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1answer
3k views

Cannot update custom database table row

I am trying to update a row in a custom database table by $wpdb->update();. In my opinion my code is right but for some reason my database row doesn't update. Can anyone help me with this? I want ...
0
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1answer
240 views

Php file that doesn't recognize wordpress functions

I have a custom contact form that I am trying to process in other file: The form: <form method="post" action="<?php echo get_template_directory_uri() . '/templates/contact.php' ?>" name="...
2
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2answers
5k views

Should I global $wpdb outside of any of my plugin's functions scope?

I know that the general advice to global variables is to not use them at all. Still, when doing something with the Wordpress database, it is required to do global $wpdb; to access the methods ...
0
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1answer
264 views

Understanding WordPress Search

I am trying to create a custom search similar to the one on totaljobs.com but through a WordPress site. Essentially I would be able to search for both search terms and location simultaneously. The ...
0
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1answer
1k views

Current URL path variable

WordPress has a built-in variable $pagename that will give the current page. I am looking for something that will give the full url including the path before the current page. Details below. I am ...
1
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2answers
4k views

Using global $post; to get featured image for custom post via WP_Query

I'm using a site-wide function to add css to the <head> of the page pull in featured images of various as a responsive page background. It works great across the rest of my site but fails on a ...
1
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1answer
662 views

Global functions on WPMU

I work in a multisite environment where all of the sites are related. A lot of recent developments have required me to copy and paste certain functions into many different theme folders, which causes ...
0
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2answers
204 views

Test if php document executed by Wordpress or directly

Active plugin PHP files are interpreted automatically when you view a page, post, admin page, etc. I could also run a plugin PHP directly if I knew the fully qualified URL, however it will most ...
0
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1answer
107 views

What's the right way to share data between widgets?

I've got a few custom widgets in my site, which I'm targeting to specific tags. There may be a case where there may be an overlap in widget targeting, and the desirable behaviour may be to only show ...
0
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1answer
462 views

Save something to global var in add_filter

I am here again with a strange question. First, I'm using ACF plugin for adding cistom fields. My code looks somethink like that: global $testMe; $testMe = 0; function my_acf_update_value( $value, $...
0
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1answer
670 views

How can I save custom meta to one global value?

I have added a custom meta box to one of my custom post types. It contains a checkbox that will indicate that this is the "featured monthly product" (there can only ever be one). When I check this ...
0
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1answer
712 views

Display Post Meta in Header

I'm trying to get page post meta in my header so I can set some meta tags. I tried to get the global post variable but it only return true. <?php global $post; global $wp_query; echo ...
1
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2answers
1k views

What are the disadvantages of using global variable?

I am a newbie at WordPress. In my "recent posts" shortcode, I used global $post variable, because the_title() function was giving me page's title, not post's title. I am not exactly sure, but I ...
0
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1answer
1k views

How to get particular data from wp_list_comments outside the loop?

I need some help,very much new to wordpress. I need only comment title and comment date from wp_list_comments function in my post, calling from outside loop, after declared $postid as global variable....
0
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0answers
151 views

Wordpress $GLOBALS and PHP $GLOBALS

Is the php $GLOBALS associative array over written in WordPress with the WordPress $GLOBALS? I have a piece of code that uses $GLOBALS['myvariablename'] to access a global variable. It works in php, ...
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2answers
4k views

Is $page a global variable in wordpress?

I am having a problem with a local $page variable, especially when using it in The Loop. Is it a reserved variable of Wordpress? Also where can I find a list of all those global variables?
3
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1answer
3k views

Detecting Embed URLs Within post_content

I need to change the way WP outputs html when given an embed URL within the content. Example content within the WP editor: This is standard content and will be wrapped in a 'p' tag. But check out ...
5
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2answers
701 views

What is the difference between using global $current_screen and get_current_screen()?

I have been looking at get_current_screen();. I have seen there is also a global $current_screen; that I could use. Here are two examples: // Using function function wpse_post_notice() { $...
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1answer
57 views

how do i register global query in template

ok i think this is a basic php question but here goes: i have this working code: <!-- show the bands playing --> <?php $child_posts = types_child_posts('my-...
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1answer
198 views

key( $GLOBALS['wp_registered_sidebars'] ) is always showing the same value

I am using this code from another answer add_action( 'dynamic_sidebar', 'wpse_96681_hr' ); function wpse_96681_hr( $widget ) { static $counter = 0; // right sidebar in Twenty Ten. Adjust ...
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2answers
2k views

Will $current_user no longer be global?

I just had a look at Global variables in WP and I discovered that a lot has changed since the last time I looked. $current_user is no longer listed. Does that mean this and many other (old) globals ...
0
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1answer
32 views

How to save a viewer specific option

A minimal example of my problem would be default background colour is white a custom sidebar widget offers to switch background colour to green when switched to green, background shall stay green ...
4
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2answers
2k views

Registering AJAX callback function that is part of a class without instantiating the class in function.php

I'm not even sure if this is possible. But nevertheless I thought of asking. I'm in habit of wrapping/grouping AJAX calls for a particular need within a class. See below. class my_class { ...
0
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3answers
66 views

Is a multisite install what I need?

I have a client who owns a chain of clubs - all of them unique and requiring different sites, however, there will be one GLOBAL login for members. The members area will include things like club ...
3
votes
1answer
14k views

get_query_var vs global query variables?

I have query vars defined in functions.php using: add_filter('init', 'add_query_vars'); function add_query_vars() { global $wp; $wp->add_query_var('profession'); } Until now, to retrieve ...
0
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1answer
2k views

No access to global variables?

In main.js, I have a script, which is sending an ajax request to script.php. $.ajax({ type: "POST", url: "wp-content/themes/roots/script.php", data: registerdata, success: function(...
33
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4answers
192k 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 <?...
1
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2answers
5k views

Using query_posts inside single.php loop

Inside of my loop in single.php, I used a custom query using get_posts to return posts belonging to a certain category. <?php global $post; ...
1
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2answers
22k views

Defining a global array in functions.php?

I try to create an array of years, which is avaible in my template-files and in at least one other function in the functions.php. function get_the_years() { global $year_arr = range(2001, date('...
3
votes
1answer
1k views

using 1 form shortcode (si or cf7) for all multisite sites [closed]

I have a network with more than 50 sites. I want to create one contact form (which means one shortcode) using contact form 7 or fast secure contact form. Then, I want to use that shortcode on all the ...
14
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2answers
1k views

What is a good alternative to using $content_width for image optimization?

The $content_width GLOBAL in WordPress effects many themes and even some plugins by limiting the size of images and embeds in posts, it is a requirement for themes submitted to wordpress.org. It is ...
0
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1answer
93 views

The $post variable – Did I get the grasp of how the Backend actions get parsed?

I was looking for a way to attach a custom meta box to the edit screen of a page at a specific template. I found and tried this here and from my actual point of view this can't work that way. Let me ...
1
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2answers
32k views

How to set global variable in functions.php

I want to be able to echo the URL of the featured image of a post and after looking some on the web I found the following which works fine when I put it in a loop in my front page template. <?php ...
2
votes
2answers
881 views

Retrieve the template directory URI via global or get_template_directory_uri() every time?

One Wordpress function I happen to use frequently is get_template_directory_uri(). While I tried to minimize or avoid its use where I can, I still happen to have more than one call to this function in ...
4
votes
1answer
2k views

Using global $post v/s $GLOBALS['post']

It's probably more of a PHP question, but I would like to know if there are any differences in using global $post; echo $post->ID; when compared to echo $GLOBALS['post']->ID; to access the ...
0
votes
1answer
2k views

get_posts() and global variables

I was reading this post: When should you use WP_Query vs query_posts() vs get_posts()?, which seems to have become the go-to post for understanding the difference between the different functions for ...
2
votes
1answer
183 views

Change global values from templates

I am trying to check for a php variable in each of my template in order to assign it a different styling but the value seems to disappear, can you please help, I already spent hours trying to figure ...
1
vote
1answer
2k views

How to make global post work with custom post type?

I was wondering to know if it's possible to use global posts with custom_types. I was working with this function: global $post; $myposts = get_posts('numberposts=4&offset=1& category=3,4'); ...
2
votes
1answer
1k views

Pass variables from one widget to another widget

I wrote a widget but I need to use the variables from one widget in another...both widgets are in the same dynamic sidebar. This is what I am trying to do: I wrote a widget that adds a footer to the ...
0
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1answer
1k views

Passing global variable from header.php to functions.php

Situation: Is header.php file where is code: if(is_single()){ global $my_global_var; $my_global_var == true; } Is functions.php file where is code: global $my_global_var; if($my_global_var == true) {...
0
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4answers
1k views

Does WP have a global of $id?

I'm trying to attach an object to every post of any type. This will require post ID to populate or create my object. So, I either call global $post, or get_the_ID(), or do get_post(). I hope there is ...
1
vote
1answer
283 views

How to check if this is the nth instance of a given shortcode in a post

Suppose I have a shortcode called [item], which I have used 20 times in a particular post. Is it possible, from within the shortcode handler function, to know what the numerical index of the given [...