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<?php $arr = [ 0 => ['Peter' => 4], 1 => ['Piper' => 4], 2 => ['picked' => 4], 3 => ['peck' => 4], 4 => ['pickled' => 4], ]; $temp = array_map(function($a){ return key($a); }, $arr); natcasesort($temp); $result = []; foreach($temp as $v){ foreach($arr as $v1){ if($v == key($v1)){ $result[] = $v1; break; } } } print_r($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 12, Position 2 = 26
Branch analysis from position: 12
2 jumps found. (Code = 78) Position 1 = 13, Position 2 = 26
Branch analysis from position: 13
2 jumps found. (Code = 77) Position 1 = 14, Position 2 = 24
Branch analysis from position: 14
2 jumps found. (Code = 78) Position 1 = 15, Position 2 = 24
Branch analysis from position: 15
2 jumps found. (Code = 43) Position 1 = 20, Position 2 = 23
Branch analysis from position: 20
1 jumps found. (Code = 42) Position 1 = 24
Branch analysis from position: 24
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
Branch analysis from position: 23
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
Branch analysis from position: 24
Branch analysis from position: 24
Branch analysis from position: 26
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 26
filename:       /in/8I2sL
function name:  (null)
number of ops:  31
compiled vars:  !0 = $arr, !1 = $temp, !2 = $result, !3 = $v, !4 = $v1
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   10     1        INIT_FCALL                                                   'array_map'
          2        DECLARE_LAMBDA_FUNCTION                              ~6      [0]
   12     3        SEND_VAL                                                     ~6
          4        SEND_VAR                                                     !0
   10     5        DO_ICALL                                             $7      
          6        ASSIGN                                                       !1, $7
   13     7        INIT_FCALL                                                   'natcasesort'
          8        SEND_REF                                                     !1
          9        DO_ICALL                                                     
   14    10        ASSIGN                                                       !2, <array>
   15    11      > FE_RESET_R                                           $11     !1, ->26
         12    > > FE_FETCH_R                                                   $11, !3, ->26
   16    13    > > FE_RESET_R                                           $12     !0, ->24
         14    > > FE_FETCH_R                                                   $12, !4, ->24
   17    15    >   INIT_FCALL                                                   'key'
         16        SEND_VAR                                                     !4
         17        DO_ICALL                                             $13     
         18        IS_EQUAL                                                     !3, $13
         19      > JMPZ                                                         ~14, ->23
   18    20    >   ASSIGN_DIM                                                   !2
         21        OP_DATA                                                      !4
   19    22      > JMP                                                          ->24
   16    23    > > JMP                                                          ->14
         24    >   FE_FREE                                                      $12
   15    25      > JMP                                                          ->12
         26    >   FE_FREE                                                      $11
   23    27        INIT_FCALL                                                   'print_r'
         28        SEND_VAR                                                     !2
         29        DO_ICALL                                                     
         30      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8I2sL
function name:  {closure:/in/8I2sL:10}
number of ops:  6
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   10     0  E >   RECV                                                 !0      
   11     1        INIT_FCALL                                                   'key'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                             $1      
          4      > RETURN                                                       $1
   12     5*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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