wp-includes/ms-functions.php:2426Determines whether to force SSL on content.
$forcebooloptional''boolfunction force_ssl_content( $force = '' ) { static $forced_content = false; if ( ! $force ) { $old_forced = $forced_content; $forced_content = $force; return $old_forced; } return $forced_content;}Introduced in 2.8.5. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
$force retyped from bool to bool|null.verified against sourcesrc/wp-includes/ms-functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.