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<?php declare(strict_types=1); class Foo { public function getTest($bar = null):? int { if($bar === 'test'){ return 1; } } } $test = new Foo(); var_dump($test->getTest()); var_dump($test->getTest('test'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/o5ufU
function name:  (null)
number of ops:  15
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   NEW                                              $1      'Foo'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   15     3        INIT_FCALL                                               'var_dump'
          4        INIT_METHOD_CALL                                         !0, 'getTest'
          5        DO_FCALL                                      0  $4      
          6        SEND_VAR                                                 $4
          7        DO_ICALL                                                 
   16     8        INIT_FCALL                                               'var_dump'
          9        INIT_METHOD_CALL                                         !0, 'getTest'
         10        SEND_VAL_EX                                              'test'
         11        DO_FCALL                                      0  $6      
         12        SEND_VAR                                                 $6
         13        DO_ICALL                                                 
         14      > RETURN                                                   1

Class Foo:
Function gettest:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 4
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/o5ufU
function name:  getTest
number of ops:  6
compiled vars:  !0 = $bar
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   RECV_INIT                                        !0      null
    7     1        IS_IDENTICAL                                             !0, 'test'
          2      > JMPZ                                                     ~1, ->4
    8     3    > > RETURN                                                   1
   10     4    >   VERIFY_RETURN_TYPE                                       
          5      > RETURN                                                   null

End of function gettest

End of class Foo.

Generated using Vulcan Logic Dumper, using php 8.0.0


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