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March 27, 2023 13:25
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Facebook event app opener - do you have your own redirect in front of your Fb-event? Then it will most likely not open the app since the first request must be to a facebook-domain. But this lil' script attempts to open the app (only on mobile), if not it will redirects you as a fallback.
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| <?php $fbId = isset($_GET['fb_id']) ? $_GET['fb_id'] : false; ?> | |
| <?php $whitelistedIds = ['your-event-id']; ?> | |
| <?php if ($fbId && (count($whitelistedIds) == 0 || in_array($fbId, $whitelistedIds))) { ?> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title></title> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| window.onload = function() { | |
| var id = '<?php echo htmlspecialchars($fbId); ?>', | |
| desktopFallback = 'https://www.facebook.com/events/' + id, | |
| mobileFallback = 'https://www.facebook.com/events/' + id, | |
| app = 'fb://events/' + id; | |
| if ( /Android|iPhone|iPad|iPod/i.test(navigator.userAgent) ) { | |
| window.location = app; | |
| window.setTimeout(function() { | |
| window.location = mobileFallback; | |
| }, 250); | |
| } else { | |
| window.location = desktopFallback; | |
| } | |
| function killPopup() { | |
| window.removeEventListener('pagehide', killPopup); | |
| } | |
| window.addEventListener('pagehide', killPopup); | |
| }; | |
| </script> | |
| </body> | |
| </html> | |
| <?php } else { http_response_code(404); } ?> |
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