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<?php preg_match('/(^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}(,{1}[\w-\.]+@([\w-]+\.)+[\w-]{2,4})*$)|^$/', "foo");
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lW4dQ
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%28%5E%5B%5Cw-%5C.%5D%2B%40%28%5B%5Cw-%5D%2B%5C.%29%2B%5B%5Cw-%5D%7B2%2C4%7D%28%2C%7B1%7D%5B%5Cw-%5C.%5D%2B%40%28%5B%5Cw-%5D%2B%5C.%29%2B%5B%5Cw-%5D%7B2%2C4%7D%29%2A%24%29%7C%5E%24%2F'
          2        SEND_VAL                                                 'foo'
          3        DO_ICALL                                                 
          4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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