As this Tips section of the web site implies, you will find a few hard-to-remember or less than obvious PHP programming techniques.
Return an HTTP Status Code:
http_response_code( 205 );
- A 500 Server Error is set by Apache for any HTTP Status Code returned by PHP that Apache does not recognize
Display MySQL Version:
global $wpdb; echo '<p>MySQL Version ' . $wpdb->get_var( 'SELECT VERSION();', 0, 0 ) . '</p>';