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apply_filters( 'allow_subdirectory_install', bool $allow )

Filters whether to enable the subdirectory installation feature in Multisite.

$allow: (bool) Whether to enable the subdirectory installation feature in Multisite. Default false.

Used By	Description
wp-admin/includes/network.php: allow_subdirectory_install()	Allow subdirectory installation.

Version	Description
3.0.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/allow_subdirectory_install