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<?php $items = ['foo', 0]; sort($items); var_dump($items);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gaUVQ
function name:  (null)
number of ops:  8
compiled vars:  !0 = $items
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, <array>
   5     1        INIT_FCALL                                               'sort'
         2        SEND_REF                                                 !0
         3        DO_ICALL                                                 
   7     4        INIT_FCALL                                               'var_dump'
         5        SEND_VAR                                                 !0
         6        DO_ICALL                                                 
         7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.4.0