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<?php /* Function to reverse $arr from start to end*/ function reverseArray(&$arr, $start, $end) { while ($start < $end) { [$arr[$start],$arr[$end]] = [$arr[$end],$arr[$start]]; $start++; $end--; } } $a = [1,2,3,4]; reverseArray($a,0,count($a)-1); print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sdBRo
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   16     0  E >   ASSIGN                                                       !0, <array>
   17     1        INIT_FCALL                                                   'reversearray'
          2        SEND_REF                                                     !0
          3        SEND_VAL                                                     0
          4        COUNT                                                ~2      !0
          5        SUB                                                  ~3      ~2, 1
          6        SEND_VAL                                                     ~3
          7        DO_FCALL                                          0          
   18     8        INIT_FCALL                                                   'print_r'
          9        SEND_VAR                                                     !0
         10        DO_ICALL                                                     
         11      > RETURN                                                       1

Function reversearray:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 17
Branch analysis from position: 17
2 jumps found. (Code = 44) Position 1 = 19, Position 2 = 4
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
2 jumps found. (Code = 44) Position 1 = 19, Position 2 = 4
Branch analysis from position: 19
Branch analysis from position: 4
filename:       /in/sdBRo
function name:  reverseArray
number of ops:  20
compiled vars:  !0 = $arr, !1 = $start, !2 = $end
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    4     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
    5     2        RECV                                                 !2      
    7     3      > JMP                                                          ->17
    9     4    >   FETCH_DIM_R                                          ~3      !0, !2
          5        INIT_ARRAY                                           ~4      ~3
          6        FETCH_DIM_R                                          ~5      !0, !1
          7        ADD_ARRAY_ELEMENT                                    ~4      ~5
          8        FETCH_LIST_R                                         $6      ~4, 0
          9        ASSIGN_DIM                                                   !0, !1
         10        OP_DATA                                                      $6
         11        FETCH_LIST_R                                         $8      ~4, 1
         12        ASSIGN_DIM                                                   !0, !2
         13        OP_DATA                                                      $8
         14        FREE                                                         ~4
   11    15        PRE_INC                                                      !1
   12    16        PRE_DEC                                                      !2
    7    17    >   IS_SMALLER                                                   !1, !2
         18      > JMPNZ                                                        ~12, ->4
   14    19    > > RETURN                                                       null

End of function reversearray

Generated using Vulcan Logic Dumper, using php 8.5.0


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