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<?php echo filter_var('denis.cutic@gmail.com', FILTER_VALIDATE_REGEXP, array("options" => array("regexp" => "/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+[a-zA-Z0-9]{2,4}$/"))); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/E4bfi
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'filter_var'
          1        SEND_VAL                                                 'denis.cutic%40gmail.com'
          2        SEND_VAL                                                 272
          3        SEND_VAL                                                 <array>
          4        DO_ICALL                                         $0      
          5        ECHO                                                     $0
    4     6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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