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<?php $isset = 'isset'; var_dump($isset(null)); $empty = 'empty'; var_dump($empty(null));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fl479
function name:  (null)
number of ops:  15
compiled vars:  !0 = $isset, !1 = $empty
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, 'isset'
    5     1        INIT_FCALL                                               'var_dump'
          2        INIT_DYNAMIC_CALL                                        !0
          3        SEND_VAL_EX                                              null
          4        DO_FCALL                                      0  $3      
          5        SEND_VAR                                                 $3
          6        DO_ICALL                                                 
    7     7        ASSIGN                                                   !1, 'empty'
    8     8        INIT_FCALL                                               'var_dump'
          9        INIT_DYNAMIC_CALL                                        !1
         10        SEND_VAL_EX                                              null
         11        DO_FCALL                                      0  $6      
         12        SEND_VAR                                                 $6
         13        DO_ICALL                                                 
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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