wp-includes/theme.php:3770Returns a URL to load the Customizer.
$stylesheetstringoptional''stringfunction wp_customize_url( $stylesheet = '' ) { $url = admin_url( 'customize.php' ); if ( $stylesheet ) { $url = add_query_arg( 'theme', urlencode( $stylesheet ), $url ); } return esc_url( $url );}Introduced in 3.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.