The tag has no wiki summary.

learn more… | top users | synonyms (1)

9
votes
4answers
5k views

WordPress Multisite - global categories

Setting up a WP multisite instance - the client has an existing ontology / set of categories that they want to classify all content across the set of blogs. Also the desire is that any new categories ...
12
votes
5answers
2k views

How to include code only on specific pages?

I'm learning about plugins and shortcodes. I noticed that when I activate my plugin its code gets loaded on all of my pages-- even pages that don't have my shortcode. (I don't mean content vs. admin ...
4
votes
2answers
2k views

Does an activated plugin automatically mean its methods are available to other WP functions?

I made a WordPress plugin like this: Class MY_CLASS { //codes } Global $myclass; $myclass = New MY_CLASS (); After installed and activated the plugin, can I use this class in other plugins without ...
4
votes
2answers
4k views

query_posts() in function makes global $wp_query out of sync?

This has me stumped for a while already. Either I am missing something very obvious or something very not obvious. I am also not entirely sure if this has something to do with WP or purely PHP ...
0
votes
2answers
4k 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 ...
1
vote
1answer
430 views

Passing variables to templates (alternatives to globalizing variables)

I want to make my WP code simpler (there's some mess within header.php, page.php etc.). So, for example, I want to set something like this global: $foo = get_option('foo'); So $foo will work ...
5
votes
2answers
156 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() { ...
1
vote
3answers
10k 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 ...
0
votes
0answers
11 views

Use admin notices to show errors [duplicate]

I'm using the transition_post_status hook to perform some operations after publishing a post. If an error occurs, I would like to use the admin notices to show a message to the user: ...
0
votes
1answer
2k views

How to call a function only once (global variable scope)

I have been trying to work out the most effecient way to use functions in WordPress. I have a big slow function big_slow_function() that ideally is only run once. But I need to use the boolean that ...