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<?php $invalid_utf8 = "\xE9"; $result = preg_match('/^(.*)(\s+(DESC|ASC|))*$/Ui', $invalid_utf8, $matches); var_dump($result); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DX1pm
function name:  (null)
number of ops:  14
compiled vars:  !0 = $invalid_utf8, !1 = $result, !2 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%E9'
    5     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E%28.%2A%29%28%5Cs%2B%28DESC%7CASC%7C%29%29%2A%24%2FUi'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !2
          5        DO_ICALL                                         $4      
          6        ASSIGN                                                   !1, $4
    6     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
    7    10        INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !2
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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