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<?php $string = 'test' . chr(0) . "\n" . 'test' . "\r\n" ; mb_ereg('[\0\r\n]', $string, $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hLkLW
function name:  (null)
number of ops:  10
compiled vars:  !0 = $string, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'test%00%0Atest%0D%0A'
    7     1        INIT_FCALL                                               'mb_ereg'
          2        SEND_VAL                                                 '%5B%5C0%5Cr%5Cn%5D'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    8     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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