3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $access_token = 'EAANN7w5edCMBAD57ZBQncnUCzI5ZBmDz0cU2uSTN5bKn4xwBp2nT5CCKnz7gtu3PnNSUXZApceMd60SX1ULsd87XeWh7YDgFj7m77FKnMQkPz28OTmHzwdTXaURg2OIJ4c1ZCUfTXsDc9E52GZANqCvKXKzqRZAKkCPwfDE5UXJwZDZD'; $app_secret = '4ee65649196bbe545409e15eb1e6b264'; $appsecret_proof= hash_hmac('sha256', $access_token, $app_secret);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc6