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<?php $data = [27, 38, 58, 82]; usort( $data, function ($a, $b) { echo "Comparing $a - $b", PHP_EOL; return $a - $b; } );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sX5Ye
function name:  (null)
number of ops:  7
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'usort'
    6     2        SEND_REF                                                 !0
    7     3        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FsX5Ye%3A7%240'
   10     4        SEND_VAL                                                 ~2
          5        DO_ICALL                                                 
   11     6      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FsX5Ye%3A7%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sX5Ye
function name:  {closure}
number of ops:  11
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    8     2        ROPE_INIT                                     4  ~3      'Comparing+'
          3        ROPE_ADD                                      1  ~3      ~3, !0
          4        ROPE_ADD                                      2  ~3      ~3, '+-+'
          5        ROPE_END                                      3  ~2      ~3, !1
          6        ECHO                                                     ~2
          7        ECHO                                                     '%0A'
    9     8        SUB                                              ~5      !0, !1
          9      > RETURN                                                   ~5
   10    10*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FsX5Ye%3A7%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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