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<?php $access_token = 'EAANN7w5edCMBAD57ZBQncnUCzI5ZBmDz0cU2uSTN5bKn4xwBp2nT5CCKnz7gtu3PnNSUXZApceMd60SX1ULsd87XeWh7YDgFj7m77FKnMQkPz28OTmHzwdTXaURg2OIJ4c1ZCUfTXsDc9E52GZANqCvKXKzqRZAKkCPwfDE5UXJwZDZD'; $app_secret = '4ee65649196bbe545409e15eb1e6b264'; $appsecret_proof= hash_hmac('sha256', $access_token, $app_secret); echo $appsecret_proof;
based on E0ep3
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/T97r0
function name:  (null)
number of ops:  10
compiled vars:  !0 = $access_token, !1 = $app_secret, !2 = $appsecret_proof
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, 'EAANN7w5edCMBAD57ZBQncnUCzI5ZBmDz0cU2uSTN5bKn4xwBp2nT5CCKnz7gtu3PnNSUXZApceMd60SX1ULsd87XeWh7YDgFj7m77FKnMQkPz28OTmHzwdTXaURg2OIJ4c1ZCUfTXsDc9E52GZANqCvKXKzqRZAKkCPwfDE5UXJwZDZD'
   4     1        ASSIGN                                                   !1, '4ee65649196bbe545409e15eb1e6b264'
   5     2        INIT_FCALL                                               'hash_hmac'
         3        SEND_VAL                                                 'sha256'
         4        SEND_VAR                                                 !0
         5        SEND_VAR                                                 !1
         6        DO_ICALL                                         $5      
         7        ASSIGN                                                   !2, $5
   6     8        ECHO                                                     !2
         9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0