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<?php function createMultiKeyCmpFunc($cmp, $key /* , keys... */) { $keys = func_get_args(); array_shift($keys); return function (array $a, array $b) use ($cmp, $keys) { return array_reduce($keys, function ($result, $key) use ($cmp, $a, $b) { return $result ?: call_user_func($cmp, $a[$key], $b[$key]); }); }; } $array = [ ['foo' => 4, 'bar' => 2, 'baz' => 3], ['foo' => 4, 'bar' => 3, 'baz' => 3], ['foo' => 3, 'bar' => 2, 'baz' => 3], ['foo' => 4, 'bar' => 1, 'baz' => 6], ['foo' => 3, 'bar' => 2, 'baz' => 3], ['foo' => 1, 'bar' => 4, 'baz' => 3], ['foo' => 2, 'bar' => 2, 'baz' => 1], ['foo' => 6, 'bar' => 6, 'baz' => 8], ['foo' => 6, 'bar' => 2, 'baz' => 3], ['foo' => 3, 'bar' => 1, 'baz' => 5], ['foo' => 4, 'bar' => 2, 'baz' => 3], ]; usort($array, createMultiKeyCmpFunc('strcmp', 'foo', 'bar', 'baz')); var_dump($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rRFJ9
function name:  (null)
number of ops:  15
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   ASSIGN                                                   !0, <array>
   28     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        INIT_FCALL                                               'createmultikeycmpfunc'
          4        SEND_VAL                                                 'strcmp'
          5        SEND_VAL                                                 'foo'
          6        SEND_VAL                                                 'bar'
          7        SEND_VAL                                                 'baz'
          8        DO_FCALL                                      0  $2      
          9        SEND_VAR                                                 $2
         10        DO_ICALL                                                 
   30    11        INIT_FCALL                                               'var_dump'
         12        SEND_VAR                                                 !0
         13        DO_ICALL                                                 
         14      > RETURN                                                   1

Function createmultikeycmpfunc:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rRFJ9
function name:  createMultiKeyCmpFunc
number of ops:  12
compiled vars:  !0 = $cmp, !1 = $key, !2 = $keys
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    4     2        FUNC_GET_ARGS                                    ~3      
          3        ASSIGN                                                   !2, ~3
    5     4        INIT_FCALL                                               'array_shift'
          5        SEND_REF                                                 !2
          6        DO_ICALL                                                 
    7     7        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FrRFJ9%3A7%240'
          8        BIND_LEXICAL                                             ~6, !0
          9        BIND_LEXICAL                                             ~6, !2
   11    10      > RETURN                                                   ~6
   12    11*     > RETURN                                                   null

End of function createmultikeycmpfunc

Function %00%7Bclosure%7D%2Fin%2FrRFJ9%3A7%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rRFJ9
function name:  {closure}
number of ops:  14
compiled vars:  !0 = $a, !1 = $b, !2 = $cmp, !3 = $keys
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        BIND_STATIC                                              !3
    8     4        INIT_FCALL                                               'array_reduce'
          5        SEND_VAR                                                 !3
          6        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FrRFJ9%3A8%241'
          7        BIND_LEXICAL                                             ~4, !2
          8        BIND_LEXICAL                                             ~4, !0
          9        BIND_LEXICAL                                             ~4, !1
   10    10        SEND_VAL                                                 ~4
         11        DO_ICALL                                         $5      
         12      > RETURN                                                   $5
   11    13*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FrRFJ9%3A7%240

Function %00%7Bclosure%7D%2Fin%2FrRFJ9%3A8%241:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rRFJ9
function name:  {closure}
number of ops:  15
compiled vars:  !0 = $result, !1 = $key, !2 = $cmp, !3 = $a, !4 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        BIND_STATIC                                              !3
          4        BIND_STATIC                                              !4
    9     5        JMP_SET                                          ~5      !0, ->13
          6        INIT_USER_CALL                                2          'call_user_func', !2
          7        FETCH_DIM_R                                      ~6      !3, !1
          8        SEND_USER                                                ~6
          9        FETCH_DIM_R                                      ~7      !4, !1
         10        SEND_USER                                                ~7
         11        DO_FCALL                                      0  $8      
         12        QM_ASSIGN                                        ~5      $8
         13      > RETURN                                                   ~5
   10    14*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FrRFJ9%3A8%241

Generated using Vulcan Logic Dumper, using php 8.0.0


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