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<?php function doStuff() { $last = 0; $current = 1; yield 1; while ($current < 1000000) { $current = $last + $current; $last = $current - $last; yield $current; } } foreach(doStuff() as $num) echo $num, "\n"; ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 7
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 7
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/puV0f
function name:  (null)
number of ops:  9
compiled vars:  !0 = $num
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   INIT_FCALL                                               'dostuff'
          1        DO_FCALL                                      0  $1      
          2      > FE_RESET_R                                       $2      $1, ->7
          3    > > FE_FETCH_R                                               $2, !0, ->7
   15     4    >   ECHO                                                     !0
          5        ECHO                                                     '%0A'
   14     6      > JMP                                                      ->3
          7    >   FE_FREE                                                  $2
   16     8      > RETURN                                                   1

Function dostuff:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
2 jumps found. (Code = 44) Position 1 = 12, Position 2 = 5
Branch analysis from position: 12
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 5
2 jumps found. (Code = 44) Position 1 = 12, Position 2 = 5
Branch analysis from position: 12
Branch analysis from position: 5
filename:       /in/puV0f
function name:  doStuff
number of ops:  13
compiled vars:  !0 = $last, !1 = $current
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   GENERATOR_CREATE                                         
    4     1        ASSIGN                                                   !0, 0
    5     2        ASSIGN                                                   !1, 1
    6     3        YIELD                                                    1
    7     4      > JMP                                                      ->10
    8     5    >   ADD                                              ~5      !0, !1
          6        ASSIGN                                                   !1, ~5
    9     7        SUB                                              ~7      !1, !0
          8        ASSIGN                                                   !0, ~7
   10     9        YIELD                                                    !1
    7    10    >   IS_SMALLER                                               !1, 1000000
         11      > JMPNZ                                                    ~10, ->5
   12    12    > > GENERATOR_RETURN                                         

End of function dostuff

Generated using Vulcan Logic Dumper, using php 8.0.0


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