Created
November 20, 2012 19:13
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Simple Server Sent Events Example
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| <?php | |
| header('Cache-Control: no-cache'); | |
| header('Content-Type: text/event-stream'); | |
| $data = ''; | |
| // do stuff, get $something | |
| $result = db_query('SELECT COUNT(*) as count FROM users WHERE last_login > date_add(current_timestamp, interval -15 minute)'); | |
| $usercount = db_fetch_array($result)[0]->count; | |
| echo "count: " . $usercount . PHP_EOL; | |
| echo PHP_EOL; | |
| ob_flush(); | |
| flush(); | |
| exit(); |
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| var source = new EventSource("eventstream.php"); | |
| var current; | |
| source.onmessage = function(event){ | |
| if(event.data && event.data != current){ | |
| current = event.count; | |
| //data has changed, do stuff! | |
| $("#users-online").text(current); | |
| } | |
| } |
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| <html> | |
| <head> | |
| <title>Number of users</title> | |
| <script src="script.js" type="text/javascript"></script> | |
| </head> | |
| <body> | |
| <div id="users-online">0</div> | |
| </body> | |
| </html> |
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