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<?php class ZunicoreNull { public function __toString() { // return an empty string that in PHP evaluates to false return ''; } } $null = new ZunicoreNull; if ((string)$null) { print "is true"; } else { print "is false"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MTPZ7
function name:  (null)
number of ops:  10
compiled vars:  !0 = $null
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CLASS                                            'zunicorenull'
   11     1        NEW                                              $1      'ZunicoreNull'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
   13     4        CAST                                          6  ~4      !0
          5      > JMPZ                                                     ~4, ->8
   14     6    >   ECHO                                                     'is+true'
          7      > JMP                                                      ->9
   17     8    >   ECHO                                                     'is+false'
   18     9    > > RETURN                                                   1

Class ZunicoreNull:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MTPZ7
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E > > RETURN                                                   ''
    8     1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class ZunicoreNull.

Generated using Vulcan Logic Dumper, using php 8.0.0


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