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<?php function xrange($start, $limit, $step = 1) { for ($i = $start; $i <= $limit; $i += $step) { yield $i; } } echo 'Single digit odd numbers: '; /* * Note that an array is never created or returned, * which saves memory. */ foreach (xrange(1, 9, 2) as $number) { echo "$number "; } echo "\n";
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
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/buTev
function name:  (null)
number of ops:  15
compiled vars:  !0 = $number
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   ECHO                                                     'Single+digit+odd+numbers%3A+'
   14     1        INIT_FCALL                                               'xrange'
          2        SEND_VAL                                                 1
          3        SEND_VAL                                                 9
          4        SEND_VAL                                                 2
          5        DO_FCALL                                      0  $1      
          6      > FE_RESET_R                                       $2      $1, ->12
          7    > > FE_FETCH_R                                               $2, !0, ->12
   15     8    >   NOP                                                      
          9        FAST_CONCAT                                      ~3      !0, '+'
         10        ECHO                                                     ~3
   14    11      > JMP                                                      ->7
         12    >   FE_FREE                                                  $2
   18    13        ECHO                                                     '%0A'
         14      > RETURN                                                   1

Function xrange:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
2 jumps found. (Code = 44) Position 1 = 10, Position 2 = 6
Branch analysis from position: 10
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 6
2 jumps found. (Code = 44) Position 1 = 10, Position 2 = 6
Branch analysis from position: 10
Branch analysis from position: 6
filename:       /in/buTev
function name:  xrange
number of ops:  11
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        ASSIGN                                                   !3, !0
          5      > JMP                                                      ->8
    4     6    >   YIELD                                                    !3
    3     7        ASSIGN_OP                                     1          !3, !2
          8    >   IS_SMALLER_OR_EQUAL                                      !3, !1
          9      > JMPNZ                                                    ~7, ->6
    6    10    > > GENERATOR_RETURN                                         

End of function xrange

Generated using Vulcan Logic Dumper, using php 8.0.0


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169.66 ms | 1398 KiB | 14 Q