wp-includes/load.php:1741Determines whether the current request is a WordPress Ajax request.
boolOne hook fires while wp_doing_ajax() runs, in this order:
Filters whether the current request is a WordPress Ajax request.
function wp_doing_ajax() { /** * Filters whether the current request is a WordPress Ajax request. * * @since 4.7.0 * * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request. */ return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );}Introduced in 4.7.0. 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.