How to make PHP variables accessible in different files?

Question

I am working on a WordPress website. I was wondering how can I share some PHP variables which are needed in multiple different files without the need to copy-paste the same variables over and over again.

I have some taxonomy variables which I need to use in different files.

This is from my single.php file:

$taxonomy_themes    = wp_get_post_terms(get_the_ID(), 'themas');
$taxonomy_rubrieken = wp_get_post_terms(get_the_ID(), 'rubrieken');

$taxonomy_themes_singular_name    = $taxonomy_themes[0]->name;
$taxonomy_rubrieken_singular_name = $taxonomy_rubrieken[0]->name;
    
$taxonomy_themes_singular_slug    =  $taxonomy_themes[0]->slug;
$taxonomy_rubrieken_singular_slug =  $taxonomy_rubrieken[0]->slug;
    
$taxonomy_themes_singular_link    = get_term_link($taxonomy_themes_singular_slug, 'themas');
$taxonomy_rubrieken_singular_link = get_term_link($taxonomy_rubrieken_singular_slug, 'rubrieken');

How can I share these files globally with other files and use them?

Put them in their own file, and then include that file in your other scripts when you need it. See https://www.php.net/manual/en/function.include.php — ADyson, Oct 30 '20 at 09:49
Does this answer your question? [How to access a variable across two files](https://stackoverflow.com/questions/18588972/how-to-access-a-variable-across-two-files) — Don't Panic, Oct 30 '20 at 10:16

GABY KARAM · Answer 1 · 2020-10-30T20:37:15.340

you can define them as a global variable using the php $GLOBALS method, the documentation of the function is available here

While it is possible to define resource constants, it is not recommended and may cause unpredictable behavior.

For you code

$taxonomy_themes    = wp_get_post_terms(get_the_ID(), 'themas');
$taxonomy_rubrieken = wp_get_post_terms(get_the_ID(), 'rubrieken');

$taxonomy_themes_singular_name    = $taxonomy_themes[0]->name;
$taxonomy_rubrieken_singular_name = $taxonomy_rubrieken[0]->name;
    
$taxonomy_themes_singular_slug    =  $taxonomy_themes[0]->slug;
$taxonomy_rubrieken_singular_slug =  $taxonomy_rubrieken[0]->slug;
    
$taxonomy_themes_singular_link    = get_term_link($taxonomy_themes_singular_slug, 'themas');
$taxonomy_rubrieken_singular_link = get_term_link($taxonomy_rubrieken_singular_slug, 'rubrieken');

 $GLOBALS['taxonomy_rubrieken_singular_link'] =  $taxonomy_rubrieken_singular_link;

// use the variable => without the dollar sign taxonomy_rubrieken_singular_link
var_dump($GLOBALS['taxonomy_rubrieken_singular_link']);

I get: Constants may only evaluate to scalar values, arrays or resources — , Oct 30 '20 at 10:19
try to use $GLOBAL, if it didn't work than I recommend to create a class and define thus variables as static properties inside the constructor of the class — GABY KARAM, Oct 30 '20 at 20:38

How to make PHP variables accessible in different files?

1 Answers1