wp-includes/revision.php:975Gets the post revision version.
$revisionWP_Postint|falsefunction _wp_get_post_revision_version( $revision ) { if ( is_object( $revision ) ) { $revision = get_object_vars( $revision ); } elseif ( ! is_array( $revision ) ) { return false; } if ( preg_match( '/^\d+-(?:autosave|revision)-v(\d+)$/', $revision['post_name'], $matches ) ) { return (int) $matches[1]; } return 0;}Introduced in 3.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/revision.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.