pixelplugin/wp-container-api
is a composer package that provides global functions
for working with a global dependency container in WordPress.
composer require pixelplugin/wp-container-api
https://packagist.org/packages/pixelplugin/wp-container-api
You need this package and some WordPress plugin that provides a global PSR-compatible container instance in $wp_container
variable, for example pixelplugin/wp-container. Then you can use the following functions to work with the container from your code.
wp_container_get(string $id): mixed
is used to get a value from the global container instance.
$value = wp_container_get(ClassName::class);
wp_container_has(string $id): bool
checks if a value exists in the global container instance.
if (wp_container_has(ClassName::class)) {
// ClassName exists in the container.
}