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<?php function xrange($start, $limit, $step = 1) { if ($start < $limit) { if ($step <= 0) { throw new LogicException('Step must be +ve'); } echo $step; for ($i = $start; $i <= $limit; $i += $step) { yield $i; echo 'iter' . $i; } } } /* * Note that both range() and xrange() result in the same * output below. */ echo 'Single digit odd numbers from range(): '; foreach (range(1, 9, -5) as $number) { echo $number; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
2 jumps found. (Code = 78) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/TKP27
function name:  (null)
number of ops:  12
compiled vars:  !0 = $number
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   21     0  E >   ECHO                                                     'Single+digit+odd+numbers+from+range%28%29%3A++'
   22     1        INIT_FCALL                                               'range'
          2        SEND_VAL                                                 1
          3        SEND_VAL                                                 9
          4        SEND_VAL                                                 -5
          5        DO_ICALL                                         $1      
          6      > FE_RESET_R                                       $2      $1, ->10
          7    > > FE_FETCH_R                                               $2, !0, ->10
   23     8    >   ECHO                                                     !0
   22     9      > JMP                                                      ->7
         10    >   FE_FREE                                                  $2
   24    11      > RETURN                                                   1

Function xrange:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 21
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 108) Position 1 = -2
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 19
Branch analysis from position: 19
2 jumps found. (Code = 44) Position 1 = 21, Position 2 = 15
Branch analysis from position: 21
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 15
2 jumps found. (Code = 44) Position 1 = 21, Position 2 = 15
Branch analysis from position: 21
Branch analysis from position: 15
Branch analysis from position: 21
filename:       /in/TKP27
function name:  xrange
number of ops:  22
compiled vars:  !0 = $start, !1 = $limit, !2 = $step, !3 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        RECV_INIT                                        !2      1
          3        GENERATOR_CREATE                                         
    4     4        IS_SMALLER                                               !0, !1
          5      > JMPZ                                                     ~4, ->21
    5     6    >   IS_SMALLER_OR_EQUAL                                      !2, 0
          7      > JMPZ                                                     ~5, ->12
    6     8    >   NEW                                              $6      'LogicException'
          9        SEND_VAL_EX                                              'Step+must+be+%2Bve'
         10        DO_FCALL                                      0          
         11      > THROW                                         0          $6
    8    12    >   ECHO                                                     !2
    9    13        ASSIGN                                                   !3, !0
         14      > JMP                                                      ->19
   10    15    >   YIELD                                                    !3
   11    16        CONCAT                                           ~10     'iter', !3
         17        ECHO                                                     ~10
    9    18        ASSIGN_OP                                     1          !3, !2
         19    >   IS_SMALLER_OR_EQUAL                                      !3, !1
         20      > JMPNZ                                                    ~12, ->15
   14    21    > > GENERATOR_RETURN                                         

End of function xrange

Generated using Vulcan Logic Dumper, using php 8.0.0


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