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<?php $postcode = 'SW196QX'; // Validate the postcode if (preg_match( '/^GIR 0AA)|((([A-Z-[QVX]][0-9][0-9]?)|(([A-Z-[QVX]][A-Z-[IJZ]][0-9][0-9]?)|(([A-Z-[QVX]][0-9][A-HJKPSTUW])|([A-Z-[QVX]][A-Z-[IJZ]][0-9][ABEHMNPRVWXY])))) [0-9][A-Z-[CIKMOV]]{2})$/', $postcode ) === 1) { echo 'Invalid'; } else { echo 'Valid'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/eqdsr
function name:  (null)
number of ops:  11
compiled vars:  !0 = $postcode
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'SW196QX'
    6     1        INIT_FCALL                                               'preg_match'
    7     2        SEND_VAL                                                 '%2F%5EGIR+0AA%29%7C%28%28%28%5BA-Z-%5BQVX%5D%5D%5B0-9%5D%5B0-9%5D%3F%29%7C%28%28%5BA-Z-%5BQVX%5D%5D%5BA-Z-%5BIJZ%5D%5D%5B0-9%5D%5B0-9%5D%3F%29%7C%28%28%5BA-Z-%5BQVX%5D%5D%5B0-9%5D%5BA-HJKPSTUW%5D%29%7C%28%5BA-Z-%5BQVX%5D%5D%5BA-Z-%5BIJZ%5D%5D%5B0-9%5D%5BABEHMNPRVWXY%5D%29%29%29%29+%5B0-9%5D%5BA-Z-%5BCIKMOV%5D%5D%7B2%7D%29%24%2F'
    8     3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $2      
    9     5        IS_IDENTICAL                                             $2, 1
          6      > JMPZ                                                     ~3, ->9
   11     7    >   ECHO                                                     'Invalid'
          8      > JMP                                                      ->10
   14     9    >   ECHO                                                     'Valid'
   15    10    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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