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<?php function foo(int $integer): int { return $integer; } var_dump(foo(1)); var_dump(foo("1")); var_dump(foo("a"));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kXoBL
function name:  (null)
number of ops:  19
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'foo'
          2        SEND_VAL                                                 1
          3        DO_FCALL                                      0  $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                                 
    6     6        INIT_FCALL                                               'var_dump'
          7        INIT_FCALL                                               'foo'
          8        SEND_VAL                                                 '1'
          9        DO_FCALL                                      0  $2      
         10        SEND_VAR                                                 $2
         11        DO_ICALL                                                 
    7    12        INIT_FCALL                                               'var_dump'
         13        INIT_FCALL                                               'foo'
         14        SEND_VAL                                                 'a'
         15        DO_FCALL                                      0  $4      
         16        SEND_VAR                                                 $4
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kXoBL
function name:  foo
number of ops:  5
compiled vars:  !0 = $integer
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        VERIFY_RETURN_TYPE                                       !0
          2      > RETURN                                                   !0
          3*       VERIFY_RETURN_TYPE                                       
          4*     > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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