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<?php function a($depth = 0) { //return last backtrace call. If backtrace bigger then 3, return third call. if($depth === 1000) { $tmp = debug_backtrace(false); return; } return a(++$depth, str_repeat("a", 1000)); } var_dump(a());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/tKchG
function name:  (null)
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'a'
          2        DO_FCALL                                      0  $0      
          3        SEND_VAR                                                 $0
          4        DO_ICALL                                                 
          5      > RETURN                                                   1

Function a:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 8
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/tKchG
function name:  a
number of ops:  19
compiled vars:  !0 = $depth, !1 = $tmp
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_INIT                                        !0      0
    6     1        IS_IDENTICAL                                             !0, 1000
          2      > JMPZ                                                     ~2, ->8
    7     3    >   INIT_FCALL                                               'debug_backtrace'
          4        SEND_VAL                                                 <false>
          5        DO_ICALL                                         $3      
          6        ASSIGN                                                   !1, $3
    8     7      > RETURN                                                   null
   11     8    >   INIT_FCALL_BY_NAME                                       'a'
          9        PRE_INC                                          ~5      !0
         10        SEND_VAL_EX                                              ~5
         11        INIT_FCALL                                               'str_repeat'
         12        SEND_VAL                                                 'a'
         13        SEND_VAL                                                 1000
         14        DO_ICALL                                         $6      
         15        SEND_VAR_NO_REF_EX                                       $6
         16        DO_FCALL                                      0  $7      
         17      > RETURN                                                   $7
   12    18*     > RETURN                                                   null

End of function a

Generated using Vulcan Logic Dumper, using php 8.0.0


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