Filters the installation response before the installation has started.

Returning a value that could be evaluated as a WP_Error will effectively short-circuit the installation, returning that value instead.

$response bool|WP_Error

Installation response.

$hook_extra array

Extra arguments passed to hooked filters.

File: wp-admin/includes/class-wp-upgrader.php. View all references

$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );