Fix Sample App SipCall #342
Description
SipCall is throwing too many Deprecated messages from Slim, and needs to be cleaned up.
Expected Behavior
No errors, call started.
Current Behavior
“Deprecated: Return type of Slim\Helper\Set::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /…/OpenTok-PHP-SDK/sample/SipCall/vendor/slim/slim/Slim/Helper/Set.php on line 178”
Possible Solution
Code cleanup.