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<?php function a($depth = 0) { //return last backtrace call. If backtrace bigger then 3, return third call. if($depth === 1000) { if(PHP_VERSION_ID >= 50400) { return array_slice(array_filter(array_slice(debug_backtrace(~ DEBUG_BACKTRACE_PROVIDE_OBJECT & ~ DEBUG_BACKTRACE_IGNORE_ARGS, 3), 0, 3)), -1, 1); } else if(PHP_VERSION_ID >= 50306) { return array_slice(array_filter(array_slice(debug_backtrace(~ DEBUG_BACKTRACE_PROVIDE_OBJECT), 0, 3)), -1, 1); } else return array_slice(array_filter(array_slice(debug_backtrace(~ DEBUG_BACKTRACE_PROVIDE_OBJECT), 0, 3)), -1, 1); } 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/UlIlg
function name:  (null)
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   22     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 = 59
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 23
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 23
2 jumps found. (Code = 43) Position 1 = 24, Position 2 = 42
Branch analysis from position: 24
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 42
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 59
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/UlIlg
function name:  a
number of ops:  70
compiled vars:  !0 = $depth
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_INIT                                        !0      0
    6     1        IS_IDENTICAL                                             !0, 1000
          2      > JMPZ                                                     ~1, ->59
    8     3    > > JMPZ                                                     <true>, ->23
    9     4    >   INIT_FCALL                                               'array_slice'
          5        INIT_FCALL                                               'array_filter'
          6        INIT_FCALL                                               'array_slice'
          7        INIT_FCALL                                               'debug_backtrace'
          8        SEND_VAL                                                 -4
          9        SEND_VAL                                                 3
         10        DO_ICALL                                         $2      
         11        SEND_VAR                                                 $2
         12        SEND_VAL                                                 0
         13        SEND_VAL                                                 3
         14        DO_ICALL                                         $3      
         15        SEND_VAR                                                 $3
         16        DO_ICALL                                         $4      
         17        SEND_VAR                                                 $4
         18        SEND_VAL                                                 -1
         19        SEND_VAL                                                 1
         20        DO_ICALL                                         $5      
         21      > RETURN                                                   $5
         22*       JMP                                                      ->59
   12    23    > > JMPZ                                                     <true>, ->42
   13    24    >   INIT_FCALL                                               'array_slice'
         25        INIT_FCALL                                               'array_filter'
         26        INIT_FCALL                                               'array_slice'
         27        INIT_FCALL                                               'debug_backtrace'
         28        SEND_VAL                                                 -2
         29        DO_ICALL                                         $6      
         30        SEND_VAR                                                 $6
         31        SEND_VAL                                                 0
         32        SEND_VAL                                                 3
         33        DO_ICALL                                         $7      
         34        SEND_VAR                                                 $7
         35        DO_ICALL                                         $8      
         36        SEND_VAR                                                 $8
         37        SEND_VAL                                                 -1
         38        SEND_VAL                                                 1
         39        DO_ICALL                                         $9      
         40      > RETURN                                                   $9
         41*       JMP                                                      ->59
   16    42    >   INIT_FCALL                                               'array_slice'
         43        INIT_FCALL                                               'array_filter'
         44        INIT_FCALL                                               'array_slice'
         45        INIT_FCALL                                               'debug_backtrace'
         46        SEND_VAL                                                 -2
         47        DO_ICALL                                         $10     
         48        SEND_VAR                                                 $10
         49        SEND_VAL                                                 0
         50        SEND_VAL                                                 3
         51        DO_ICALL                                         $11     
         52        SEND_VAR                                                 $11
         53        DO_ICALL                                         $12     
         54        SEND_VAR                                                 $12
         55        SEND_VAL                                                 -1
         56        SEND_VAL                                                 1
         57        DO_ICALL                                         $13     
         58      > RETURN                                                   $13
   19    59    >   INIT_FCALL_BY_NAME                                       'a'
         60        PRE_INC                                          ~14     !0
         61        SEND_VAL_EX                                              ~14
         62        INIT_FCALL                                               'str_repeat'
         63        SEND_VAL                                                 'a'
         64        SEND_VAL                                                 1000
         65        DO_ICALL                                         $15     
         66        SEND_VAR_NO_REF_EX                                       $15
         67        DO_FCALL                                      0  $16     
         68      > RETURN                                                   $16
   20    69*     > RETURN                                                   null

End of function a

Generated using Vulcan Logic Dumper, using php 8.0.0


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