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<?php preg_match('/^[\w][\w-.]+@[\w-.]+\.[a-z]{2,4}$/U', abcde, $found); print_r($found);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Ei8S6
function name:  (null)
number of ops:  10
compiled vars:  !0 = $found
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5E%5B%5Cw%5D%5B%5Cw-.%5D%2B%40%5B%5Cw-.%5D%2B%5C.%5Ba-z%5D%7B2%2C4%7D%24%2FU'
          2        FETCH_CONSTANT                                   ~1      'abcde'
          3        SEND_VAL                                                 ~1
          4        SEND_REF                                                 !0
          5        DO_ICALL                                                 
    3     6        INIT_FCALL                                               'print_r'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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