wp-admin/includes/class-wp-filesystem-base.php:536Reads entire file into an array.
$filestringstring[]|false public function get_contents_array( $file ) { return false; }Introduced in 2.5.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
array|false to string[]|false.verified against sourcesrc/wp-admin/includes/class-wp-filesystem-base.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.