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<?php function merge(mixed $one, mixed $two): array { return array_merge($one, $two); } function spread(mixed $one, mixed $two): array { return [...$one, ...$two]; } spread(null, ['foo']); //merge(null, ['foo']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2YVCi
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   13     0  E >   INIT_FCALL                                                   'spread'
          1        SEND_VAL                                                     null
          2        SEND_VAL                                                     <array>
          3        DO_FCALL                                          0          
   14     4      > RETURN                                                       1

Function merge:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2YVCi
function name:  merge
number of ops:  10
compiled vars:  !0 = $one, !1 = $two
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
    5     2        INIT_FCALL                                                   'array_merge'
          3        SEND_VAR                                                     !0
          4        SEND_VAR                                                     !1
          5        DO_ICALL                                             $2      
          6        VERIFY_RETURN_TYPE                                           $2
          7      > RETURN                                                       $2
    6     8*       VERIFY_RETURN_TYPE                                           
          9*     > RETURN                                                       null

End of function merge

Function spread:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2YVCi
function name:  spread
number of ops:  9
compiled vars:  !0 = $one, !1 = $two
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    8     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   10     2        INIT_ARRAY                                           ~2      
          3        ADD_ARRAY_UNPACK                                     ~2      !0
          4        ADD_ARRAY_UNPACK                                     ~2      !1
          5        VERIFY_RETURN_TYPE                                           ~2
          6      > RETURN                                                       ~2
   11     7*       VERIFY_RETURN_TYPE                                           
          8*     > RETURN                                                       null

End of function spread

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