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<?php function foo(bool $b) {} foo('foo'); var_dump('foo' == (bool) 'foo');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Z5OMI
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'foo'
          1        SEND_VAL                                                 'foo'
          2        DO_FCALL                                      0          
    7     3        INIT_FCALL                                               'var_dump'
          4        BOOL                                             ~1      'foo'
          5        IS_EQUAL                                         ~2      ~1, 'foo'
          6        SEND_VAL                                                 ~2
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Z5OMI
function name:  foo
number of ops:  2
compiled vars:  !0 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1      > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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