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<?php function isQuadtree($bits, &$i = 0){ if ($i >= strlen($bits)) return false; if ($bits[$i] === "1") { isQuadtree($bits, $i++); isQuadtree($bits, $i++); isQuadtree($bits, $i++); return isQuadtree($bits, $i++); } return true; } var_dump(isQuadtree("110000"));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cZvCJ
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'isquadtree'
          2        SEND_VAL                                                 '110000'
          3        DO_FCALL                                      0  $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                                 
          6      > RETURN                                                   1

Function isquadtree:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 6
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 30
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cZvCJ
function name:  isQuadtree
number of ops:  32
compiled vars:  !0 = $bits, !1 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      0
    4     2        STRLEN                                           ~2      !0
          3        IS_SMALLER_OR_EQUAL                                      ~2, !1
          4      > JMPZ                                                     ~3, ->6
          5    > > RETURN                                                   <false>
    5     6    >   FETCH_DIM_R                                      ~4      !0, !1
          7        IS_IDENTICAL                                             ~4, '1'
          8      > JMPZ                                                     ~5, ->30
    6     9    >   INIT_FCALL_BY_NAME                                       'isQuadtree'
         10        SEND_VAR_EX                                              !0
         11        POST_INC                                         ~6      !1
         12        SEND_VAL_EX                                              ~6
         13        DO_FCALL                                      0          
    7    14        INIT_FCALL_BY_NAME                                       'isQuadtree'
         15        SEND_VAR_EX                                              !0
         16        POST_INC                                         ~8      !1
         17        SEND_VAL_EX                                              ~8
         18        DO_FCALL                                      0          
    8    19        INIT_FCALL_BY_NAME                                       'isQuadtree'
         20        SEND_VAR_EX                                              !0
         21        POST_INC                                         ~10     !1
         22        SEND_VAL_EX                                              ~10
         23        DO_FCALL                                      0          
    9    24        INIT_FCALL_BY_NAME                                       'isQuadtree'
         25        SEND_VAR_EX                                              !0
         26        POST_INC                                         ~12     !1
         27        SEND_VAL_EX                                              ~12
         28        DO_FCALL                                      0  $13     
         29      > RETURN                                                   $13
   11    30    > > RETURN                                                   <true>
   12    31*     > RETURN                                                   null

End of function isquadtree

Generated using Vulcan Logic Dumper, using php 8.0.0


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148.53 ms | 1017 KiB | 15 Q