3v4l.org

run code in 300+ PHP versions simultaneously
<?php $params = [1,2,3]; function transform(array &$params) { $references = []; foreach ($params as &$value) { $references[] = &$value; } $value = "foo"; return $references; } var_dump($params); $p = transform($params); var_dump($params); var_dump($p); debug_zval_dump($params); debug_zval_dump($p);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qSLXb
function name:  (null)
number of ops:  21
compiled vars:  !0 = $params, !1 = $p
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   15     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
   16     4        INIT_FCALL                                               'transform'
          5        SEND_REF                                                 !0
          6        DO_FCALL                                      0  $4      
          7        ASSIGN                                                   !1, $4
   18     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !0
         10        DO_ICALL                                                 
   19    11        INIT_FCALL                                               'var_dump'
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                                 
   21    14        INIT_FCALL                                               'debug_zval_dump'
         15        SEND_VAR                                                 !0
         16        DO_ICALL                                                 
   22    17        INIT_FCALL                                               'debug_zval_dump'
         18        SEND_VAR                                                 !1
         19        DO_ICALL                                                 
         20      > RETURN                                                   1

Function transform:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 3, Position 2 = 7
Branch analysis from position: 3
2 jumps found. (Code = 126) 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/qSLXb
function name:  transform
number of ops:  11
compiled vars:  !0 = $params, !1 = $references, !2 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV                                             !0      
    7     1        ASSIGN                                                   !1, <array>
    8     2      > FE_RESET_RW                                      $4      !0, ->7
          3    > > FE_FETCH_RW                                              $4, !2, ->7
    9     4    >   FETCH_DIM_W                                      $5      !1
          5        ASSIGN_REF                                               $5, !2
    8     6      > JMP                                                      ->3
          7    >   FE_FREE                                                  $4
   11     8        ASSIGN                                                   !2, 'foo'
   12     9      > RETURN                                                   !1
   13    10*     > RETURN                                                   null

End of function transform

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
176.1 ms | 1399 KiB | 18 Q