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<?php var_dump( preg_split("/a/u", "a\xff"), preg_match("/a/u", "a\xff", $matches), $matches );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1WYQE
function name:  (null)
number of ops:  15
compiled vars:  !0 = $matches
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
   4     1        INIT_FCALL                                               'preg_split'
         2        SEND_VAL                                                 '%2Fa%2Fu'
         3        SEND_VAL                                                 'a%FF'
         4        DO_ICALL                                         $1      
         5        SEND_VAR                                                 $1
   5     6        INIT_FCALL                                               'preg_match'
         7        SEND_VAL                                                 '%2Fa%2Fu'
         8        SEND_VAL                                                 'a%FF'
         9        SEND_REF                                                 !0
        10        DO_ICALL                                         $2      
        11        SEND_VAR                                                 $2
   6    12        SEND_VAR                                                 !0
        13        DO_ICALL                                                 
   7    14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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