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<?php $array = ['a' => ['a' => 1, 'b' => 2], 'b'=> ['a' => 0, 'b' => 1]]; usort($array, function($a, $b) { return $a['a'] <=> $b['a'] ?: $a['b'] <=> $b['b']; }); var_dump($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gUTDa
function name:  (null)
number of ops:  10
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FgUTDa%3A5%240'
    7     4        SEND_VAL                                                 ~2
          5        DO_ICALL                                                 
    9     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FgUTDa%3A5%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gUTDa
function name:  {closure}
number of ops:  12
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    6     2        FETCH_DIM_R                                      ~2      !0, 'a'
          3        FETCH_DIM_R                                      ~3      !1, 'a'
          4        SPACESHIP                                        ~4      ~2, ~3
          5        JMP_SET                                          ~5      ~4, ->10
          6        FETCH_DIM_R                                      ~6      !0, 'b'
          7        FETCH_DIM_R                                      ~7      !1, 'b'
          8        SPACESHIP                                        ~8      ~6, ~7
          9        QM_ASSIGN                                        ~5      ~8
         10      > RETURN                                                   ~5
    7    11*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FgUTDa%3A5%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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168.65 ms | 1395 KiB | 17 Q