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<?php $str = 'e ,a\\,b\\\\,c\\\\\\,ds\\\\'; preg_match_all('/(?:[^\x5c,]|\x5c(?:.|$))+/', $str, $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qqkA3
function name:  (null)
number of ops:  10
compiled vars:  !0 = $str, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'e+%2Ca%5C%2Cb%5C%5C%2Cc%5C%5C%5C%2Cds%5C%5C'
    5     1        INIT_FCALL                                               'preg_match_all'
          2        SEND_VAL                                                 '%2F%28%3F%3A%5B%5E%5Cx5c%2C%5D%7C%5Cx5c%28%3F%3A.%7C%24%29%29%2B%2F'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    7     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !1
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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