wp_transition_comment_status( string $new_status, string $old_status, WP_Comment $comment )

1929function wp_transition_comment_status( $new_status, $old_status, $comment ) {1930	/*1931	 * Translate raw statuses to human-readable formats for the hooks.1932	 * This is not a complete list of comment status, it's only the ones1933	 * that need to be renamed.1934	 */1935	$comment_statuses = array(1936		0         => 'unapproved',1937		'hold'    => 'unapproved', // wp_set_comment_status() uses "hold".1938		1         => 'approved',1939		'approve' => 'approved',   // wp_set_comment_status() uses "approve".1940	);1941	if ( isset( $comment_statuses[ $new_status ] ) ) {1942		$new_status = $comment_statuses[ $new_status ];1943	}1944	if ( isset( $comment_statuses[ $old_status ] ) ) {1945		$old_status = $comment_statuses[ $old_status ];1946	}1947 1948	// Call the hooks.1949	if ( $new_status !== $old_status ) {1950		/**1951		 * Fires when the comment status is in transition.1952		 *1953		 * @since 2.7.01954		 *1955		 * @param string     $new_status The new comment status.1956		 * @param string     $old_status The old comment status.1957		 * @param WP_Comment $comment    Comment object.1958		 */1959		do_action( 'transition_comment_status', $new_status, $old_status, $comment );1960 1961		/**1962		 * Fires when the comment status is in transition from one specific status to another.1963		 *1964		 * The dynamic portions of the hook name, `$old_status`, and `$new_status`,1965		 * refer to the old and new comment statuses, respectively.1966		 *1967		 * Possible hook names include:1968		 *1969		 *  - `comment_unapproved_to_approved`1970		 *  - `comment_spam_to_approved`1971		 *  - `comment_approved_to_unapproved`1972		 *  - `comment_spam_to_unapproved`1973		 *  - `comment_unapproved_to_spam`1974		 *  - `comment_approved_to_spam`1975		 *1976		 * @since 2.7.01977		 *1978		 * @param WP_Comment $comment Comment object.1979		 */1980		do_action( "comment_{$old_status}_to_{$new_status}", $comment );1981	}1982	/**1983	 * Fires when the status of a specific comment type is in transition.1984	 *1985	 * The dynamic portions of the hook name, `$new_status`, and `$comment->comment_type`,1986	 * refer to the new comment status, and the type of comment, respectively.1987	 *1988	 * Typical comment types include 'comment', 'pingback', or 'trackback'.1989	 *1990	 * Possible hook names include:1991	 *1992	 *  - `comment_approved_comment`1993	 *  - `comment_approved_pingback`1994	 *  - `comment_approved_trackback`1995	 *  - `comment_unapproved_comment`1996	 *  - `comment_unapproved_pingback`1997	 *  - `comment_unapproved_trackback`1998	 *  - `comment_spam_comment`1999	 *  - `comment_spam_pingback`2000	 *  - `comment_spam_trackback`2001	 *2002	 * @since 2.7.02003	 *2004	 * @param string     $comment_id The comment ID as a numeric string.2005	 * @param WP_Comment $comment    Comment object.2006	 */2007	do_action( "comment_{$new_status}_{$comment->comment_type}", $comment->comment_ID, $comment );2008}
When	Instructions	Calls it makes
`$new_status === false`	22–26	`do_action()`
`$new_status !== false`	36–40	`do_action(), do_action(), do_action()`