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<?php function format(&$collection) { foreach($collection as $k => $v) { print_r($collection); $collection["prefix_{$k}"] = $v; } } $collection = array('a' => 1, 'b' => 2, 'c' => 3); format($collection); var_dump($collection);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fmfGn
function name:  (null)
number of ops:  8
compiled vars:  !0 = $collection
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   ASSIGN                                                   !0, <array>
    9     1        INIT_FCALL                                               'format'
          2        SEND_REF                                                 !0
          3        DO_FCALL                                      0          
   10     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
          7      > RETURN                                                   1

Function format:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 12
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 12
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/fmfGn
function name:  format
number of ops:  14
compiled vars:  !0 = $collection, !1 = $v, !2 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1      > FE_RESET_R                                       $3      !0, ->12
          2    > > FE_FETCH_R                                       ~4      $3, !1, ->12
          3    >   ASSIGN                                                   !2, ~4
    4     4        INIT_FCALL                                               'print_r'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
    5     7        NOP                                                      
          8        FAST_CONCAT                                      ~7      'prefix_', !2
          9        ASSIGN_DIM                                               !0, ~7
         10        OP_DATA                                                  !1
    3    11      > JMP                                                      ->2
         12    >   FE_FREE                                                  $3
    7    13      > RETURN                                                   null

End of function format

Generated using Vulcan Logic Dumper, using php 8.0.0


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