wp_doing_ajax()

Determines whether the current request is a WordPress Ajax request.

Return

(bool) True if it's a WordPress Ajax request, false otherwise.

Source

File: wp-includes/load.php 

function wp_doing_ajax() {
	/**
	 * Filters whether the current request is a ClassicPress Ajax request.
	 *
	 * @since WP-4.7.0
	 *
	 * @param bool $wp_doing_ajax Whether the current request is a ClassicPress Ajax request.
	 */
	return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
}

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Changelog

Changelog
Version Description
4.7.0 Introduced.