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<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) use (&$a) { echo "$x"; // if (!isset($a[$x])) { // throw new Exception("Key '{$x}' not found."); // } // if (!isset($a[$y])) { // throw new Exception("Key '{$y}' not found."); // } return $x < $y; });
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LFTof
function name:  (null)
number of ops:  8
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'uksort'
          2        SEND_REF                                                 !0
          3        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FLFTof%3A4%240'
          4        BIND_LEXICAL                                             ~2, !0
   15     5        SEND_VAL                                                 ~2
          6        DO_ICALL                                                 
          7      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FLFTof%3A4%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LFTof
function name:  {closure}
number of ops:  8
compiled vars:  !0 = $x, !1 = $y, !2 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
    5     3        CAST                                          6  ~3      !0
          4        ECHO                                                     ~3
   14     5        IS_SMALLER                                       ~4      !0, !1
          6      > RETURN                                                   ~4
   15     7*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FLFTof%3A4%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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