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<?php error_reporting(0); function incr(){ return @$a++; // $a is undefined } echo "tt"; echo incr();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/b1X3s
function name:  (null)
number of ops:  8
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'error_reporting'
          1        SEND_VAL                                                 0
          2        DO_ICALL                                                 
    9     3        ECHO                                                     'tt'
   10     4        INIT_FCALL                                               'incr'
          5        DO_FCALL                                      0  $1      
          6        ECHO                                                     $1
          7      > RETURN                                                   1

Function incr:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/b1X3s
function name:  incr
number of ops:  5
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   BEGIN_SILENCE                                    ~1      
          1        POST_INC                                         ~2      !0
          2        END_SILENCE                                              ~1
          3      > RETURN                                                   ~2
    7     4*     > RETURN                                                   null

End of function incr

Generated using Vulcan Logic Dumper, using php 8.0.0


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