<?php header("Content-Type: text/event-stream"); ?> : a comment (ignored) this line will be ignored since there is no field and the line itself is not a field field: an unknown field that will be ignored :another commment data : this line will be ignored since there is a space after data data data: data : dispatch event with two newlines data: simple data: spanning data:multiple data data: lines data id: 1 data: id is 1 data: id is still 1 id data: no id event: open data: a message event with the name "open" <?php flush(); echo "da"; flush(); ?> ta: a message event with the name "message" <?php echo "data: a line ending with crlf\r\n"; ?> data: a line with a : (colon) <?php echo "data: a line ending with cr\r"; ?> retry: 10000 : reconnection time set to 10 seconds retry: one thousand : ignored invalid reconnection time value retry : reset to ua default