[User Warning] Cache-Control header has already been set. Please use HTTPCacheControl API to set caching options instead.

GET /home/first-calendar/ics/announcement-385/20211022T-20211022T

Line 380 in /var/www/vhosts/alexandrapark-pri.stockport.sch.uk/public_html/framework/control/HTTP.php

Source

371 		if(headers_sent() && !$body) {
372 			return;
373 		}
374 
375 		// Warn if already assigned cache-control headers
376 		if ($body && $body->getHeader('Cache-Control')) {
377 			trigger_error(
378 				'Cache-Control header has already been set. '
379 				. 'Please use HTTPCacheControl API to set caching options instead.',
380 				E_USER_WARNING
381 			);
382 			return;
383 		}
384 
385 		$config = Config::inst()->forClass(__CLASS__);
386 

Trace

BEGIN:VCALENDAR PRODID:-//www.alexandrapark-pri.stockport.sch.uk//EN VERSION:2.0 METHOD:PUBLISH BEGIN:VEVENT DTSTART;TZID=Europe/London:20211022T DTEND;TZID=Europe/London:20211022T URL:https://www.alexandrapark-pri.stockport.sch.uk/home/first-calendar/ SUMMARY:Break up for Half Term 3.15pm END:VEVENT END:VCALENDAR