3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ ['name' => 'foo'], ['bar' => 'foo'], ]; usort($array, function ($a, $b) { return strcmp($a['name'], $b['nope']); }); echo 'after calling usort:'.PHP_EOL.PHP_EOL; var_dump($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SuJRd
function name:  (null)
number of ops:  11
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        DECLARE_LAMBDA_FUNCTION                          ~2      [0]
   10     4        SEND_VAL                                                 ~2
    8     5        DO_ICALL                                                 
   12     6        ECHO                                                     'after+calling+usort%3A%0A%0A'
   14     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
         10      > 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/SuJRd
function name:  {closure}
number of ops:  10
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    9     2        INIT_FCALL                                               'strcmp'
          3        FETCH_DIM_R                                      ~2      !0, 'name'
          4        SEND_VAL                                                 ~2
          5        FETCH_DIM_R                                      ~3      !1, 'nope'
          6        SEND_VAL                                                 ~3
          7        DO_ICALL                                         $4      
          8      > RETURN                                                   $4
   10     9*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
144.06 ms | 999 KiB | 16 Q