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<?php function run(string $name) { return $name ?? 'tom'; } var_dump(run('')); function run2(string $name) { return $name ?: 'tom'; } var_dump(run2(''));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hbFf0
function name:  (null)
number of ops:  13
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                                   'var_dump'
          1        INIT_FCALL                                                   'run'
          2        SEND_VAL                                                     ''
          3        DO_FCALL                                          0  $0      
          4        SEND_VAR                                                     $0
          5        DO_ICALL                                                     
   15     6        INIT_FCALL                                                   'var_dump'
          7        INIT_FCALL                                                   'run2'
          8        SEND_VAL                                                     ''
          9        DO_FCALL                                          0  $2      
         10        SEND_VAR                                                     $2
         11        DO_ICALL                                                     
         12      > RETURN                                                       1

Function run:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hbFf0
function name:  run
number of ops:  5
compiled vars:  !0 = $name
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   RECV                                                 !0      
    5     1        COALESCE                                             ~1      !0
          2        QM_ASSIGN                                            ~1      'tom'
          3      > RETURN                                                       ~1
    6     4*     > RETURN                                                       null

End of function run

Function run2:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hbFf0
function name:  run2
number of ops:  5
compiled vars:  !0 = $name
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   10     0  E >   RECV                                                 !0      
   12     1        JMP_SET                                              ~1      !0, ->3
          2        QM_ASSIGN                                            ~1      'tom'
          3      > RETURN                                                       ~1
   13     4*     > RETURN                                                       null

End of function run2

Generated using Vulcan Logic Dumper, using php 8.5.0


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