wp-includes/load.php:1759Determines whether the current request should use themes.
boolOne hook fires while wp_using_themes() runs, in this order:
Filters whether the current request should use themes.
function wp_using_themes() { /** * Filters whether the current request should use themes. * * @since 5.1.0 * * @param bool $wp_using_themes Whether the current request should use themes. */ return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES );}Introduced in 5.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/load.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.