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<?php function xrange($start, $limit, $step = 1) { if ($start < $limit) { if ($step <= 0) { throw new LogicException('Step must be +ve'); } for ($i = $start; $i <= $limit; $i += $step) { yield $i; } } else { if ($step >= 0) { throw new LogicException('Step must be -ve'); } for ($i = $start; $i >= $limit; $i += $step) { yield $i; } } } /* * Note that both range() and xrange() result in the same * output below. */ echo 'Single digit odd numbers from range(): '; foreach (range(1, 9, 2) as $number) { echo "$number "; } echo "\n"; echo 'Single digit odd numbers from xrange(): '; foreach (xrange(1, 9, 2) as $number) { echo "$number "; } ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 7, Position 2 = 12
Branch analysis from position: 7
2 jumps found. (Code = 78) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
Branch analysis from position: 12
2 jumps found. (Code = 77) Position 1 = 21, Position 2 = 26
Branch analysis from position: 21
2 jumps found. (Code = 78) Position 1 = 22, Position 2 = 26
Branch analysis from position: 22
1 jumps found. (Code = 42) Position 1 = 21
Branch analysis from position: 21
Branch analysis from position: 26
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 26
Branch analysis from position: 12
filename:       /in/9Dn8I
function name:  (null)
number of ops:  28
compiled vars:  !0 = $number
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   27     0  E >   ECHO                                                     'Single+digit+odd+numbers+from+range%28%29%3A++'
   28     1        INIT_FCALL                                               'range'
          2        SEND_VAL                                                 1
          3        SEND_VAL                                                 9
          4        SEND_VAL                                                 2
          5        DO_ICALL                                         $1      
          6      > FE_RESET_R                                       $2      $1, ->12
          7    > > FE_FETCH_R                                               $2, !0, ->12
   29     8    >   NOP                                                      
          9        FAST_CONCAT                                      ~3      !0, '+'
         10        ECHO                                                     ~3
   28    11      > JMP                                                      ->7
         12    >   FE_FREE                                                  $2
   31    13        ECHO                                                     '%0A'
   33    14        ECHO                                                     'Single+digit+odd+numbers+from+xrange%28%29%3A+'
   34    15        INIT_FCALL                                               'xrange'
         16        SEND_VAL                                                 1
         17        SEND_VAL                                                 9
         18        SEND_VAL                                                 2
         19        DO_FCALL                                      0  $4      
         20      > FE_RESET_R                                       $5      $4, ->26
         21    > > FE_FETCH_R                                               $5, !0, ->26
   35    22    >   NOP                                                      
         23        FAST_CONCAT                                      ~6      !0, '+'
         24        ECHO                                                     ~6
   34    25      > JMP                                                      ->21
         26    >   FE_FREE                                                  $5
   37    27      > RETURN                                                   1

Function xrange:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 19
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 = 16
Branch analysis from position: 16
2 jumps found. (Code = 44) Position 1 = 18, Position 2 = 14
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 14
2 jumps found. (Code = 44) Position 1 = 18, Position 2 = 14
Branch analysis from position: 18
Branch analysis from position: 14
Branch analysis from position: 19
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 25
Branch analysis from position: 21
1 jumps found. (Code = 108) Position 1 = -2
Branch analysis from position: 25
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
2 jumps found. (Code = 44) Position 1 = 31, Position 2 = 27
Branch analysis from position: 31
Branch analysis from position: 27
2 jumps found. (Code = 44) Position 1 = 31, Position 2 = 27
Branch analysis from position: 31
Branch analysis from position: 27
filename:       /in/9Dn8I
function name:  xrange
number of ops:  32
compiled vars:  !0 = $start, !1 = $limit, !2 = $step, !3 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        RECV_INIT                                        !2      1
          3        GENERATOR_CREATE                                         
    3     4        IS_SMALLER                                               !0, !1
          5      > JMPZ                                                     ~4, ->19
    4     6    >   IS_SMALLER_OR_EQUAL                                      !2, 0
          7      > JMPZ                                                     ~5, ->12
    5     8    >   NEW                                              $6      'LogicException'
          9        SEND_VAL_EX                                              'Step+must+be+%2Bve'
         10        DO_FCALL                                      0          
         11      > THROW                                         0          $6
    8    12    >   ASSIGN                                                   !3, !0
         13      > JMP                                                      ->16
    9    14    >   YIELD                                                    !3
    8    15        ASSIGN_OP                                     1          !3, !2
         16    >   IS_SMALLER_OR_EQUAL                                      !3, !1
         17      > JMPNZ                                                    ~11, ->14
         18    > > JMP                                                      ->31
   12    19    >   IS_SMALLER_OR_EQUAL                                      0, !2
         20      > JMPZ                                                     ~12, ->25
   13    21    >   NEW                                              $13     'LogicException'
         22        SEND_VAL_EX                                              'Step+must+be+-ve'
         23        DO_FCALL                                      0          
         24      > THROW                                         0          $13
   16    25    >   ASSIGN                                                   !3, !0
         26      > JMP                                                      ->29
   17    27    >   YIELD                                                    !3
   16    28        ASSIGN_OP                                     1          !3, !2
         29    >   IS_SMALLER_OR_EQUAL                                      !1, !3
         30      > JMPNZ                                                    ~18, ->27
   20    31    > > GENERATOR_RETURN                                         

End of function xrange

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
156.38 ms | 1403 KiB | 16 Q