apply_filters( 'network_allowed_themes', string[] $allowed_themes, int $blog_id )
Filters the array of themes allowed on the network.
Description
Site is provided as context so that a list of network allowed themes can be filtered further.
Parameters
- $allowed_themes
 -  
(string[]) An array of theme stylesheet names.
 - $blog_id
 -  
(int) ID of the site.
 
Source
Changelog
| Version | Description | 
|---|---|
| 4.5.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/hooks/network_allowed_themes