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<?php function foo() { static $x = 1; $x += 10; yield $x; $x += 100; yield $x; $x += 1000; yield $x; } $x = foo(); $x->rewind(); foreach ($x as $foo) { echo "$foo\n"; }
based on 29gGv
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = 7, Position 2 = 12
Branch analysis from position: 7
Jump found. Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
Jump found. Position 1 = 7
Branch analysis from position: 7
Branch analysis from position: 12
Jump found. Position 1 = -2
Branch analysis from position: 12
filename:       /in/AQ1j9
function name:  (null)
number of ops:  14
compiled vars:  !0 = $x, !1 = $foo
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   NOP                                                      
  12     1        INIT_FCALL                                               'foo'
         2        DO_FCALL                                      0  $2      
         3        ASSIGN                                                   !0, $2
  13     4        INIT_METHOD_CALL                                         !0, 'rewind'
         5        DO_FCALL                                      0          
  14     6      > FE_RESET_R                                       $5      !0, ->12
         7    > > FE_FETCH_R                                               $5, !1, ->12
  15     8    >   NOP                                                      
         9        FAST_CONCAT                                      ~6      !1, '%0A'
        10        ECHO                                                     ~6
        11      > JMP                                                      ->7
        12    >   FE_FREE                                                  $5
        13      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/AQ1j9
function name:  foo
number of ops:  9
compiled vars:  !0 = $x
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   FETCH_W                      static              $1      'x'
         1        ASSIGN_REF                                               !0, $1
   5     2        ASSIGN_ADD                                    0          !0, 10
   6     3        YIELD                                                    !0
   7     4        ASSIGN_ADD                                    0          !0, 100
   8     5        YIELD                                                    !0
   9     6        ASSIGN_ADD                                    0          !0, 1000
  10     7        YIELD                                                    !0
  11     8      > GENERATOR_RETURN                                         

End of function foo

Generated using Vulcan Logic Dumper, using php 7.1.0