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<?php var_dump(preg_match('/www\.tableau(software)?.com$/', 'www.tableausoftware.com')); var_dump(preg_match('/www\.tableau(software)?.com$/', 'www.tableau.com')); var_dump(preg_match('/www\.tableau(software)?.com$/', 'kb.tableausoftware.com')); var_dump(preg_match('/www\.tableau(software)?.com$/', 'not.tableauprod.net')); var_dump(preg_match('/www\.tableau(software)?.com$/', 'tab.local'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/00XBF
function name:  (null)
number of ops:  36
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2Fwww%5C.tableau%28software%29%3F.com%24%2F'
          3        SEND_VAL                                                 'www.tableausoftware.com'
          4        DO_ICALL                                         $0      
          5        SEND_VAR                                                 $0
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'preg_match'
          9        SEND_VAL                                                 '%2Fwww%5C.tableau%28software%29%3F.com%24%2F'
         10        SEND_VAL                                                 'www.tableau.com'
         11        DO_ICALL                                         $2      
         12        SEND_VAR                                                 $2
         13        DO_ICALL                                                 
    5    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'preg_match'
         16        SEND_VAL                                                 '%2Fwww%5C.tableau%28software%29%3F.com%24%2F'
         17        SEND_VAL                                                 'kb.tableausoftware.com'
         18        DO_ICALL                                         $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
    6    21        INIT_FCALL                                               'var_dump'
         22        INIT_FCALL                                               'preg_match'
         23        SEND_VAL                                                 '%2Fwww%5C.tableau%28software%29%3F.com%24%2F'
         24        SEND_VAL                                                 'not.tableauprod.net'
         25        DO_ICALL                                         $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
    7    28        INIT_FCALL                                               'var_dump'
         29        INIT_FCALL                                               'preg_match'
         30        SEND_VAL                                                 '%2Fwww%5C.tableau%28software%29%3F.com%24%2F'
         31        SEND_VAL                                                 'tab.local'
         32        DO_ICALL                                         $8      
         33        SEND_VAR                                                 $8
         34        DO_ICALL                                                 
         35      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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