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<?php $arr = array_count_values(array('JPG', 'JPG', 'TXT', 'TXT')); arsort($arr); var_dump($arr);
based on B0GIo
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/3s34a
function name:  (null)
number of ops:  11
compiled vars:  !0 = $arr
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   INIT_FCALL                                               'array_count_values'
         1        SEND_VAL                                                 <array>
         2        DO_ICALL                                         $1      
         3        ASSIGN                                                   !0, $1
   3     4        INIT_FCALL                                               'arsort'
         5        SEND_REF                                                 !0
         6        DO_ICALL                                                 
   4     7        INIT_FCALL                                               'var_dump'
         8        SEND_VAR                                                 !0
         9        DO_ICALL                                                 
        10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0