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<?php $email = "this is a valid address dannimoring@yahoo.com"; $checked = filter_var($email, FILTER_VALIDATE_EMAIL); var_dump($email, $checked);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/LiSgR
function name:  (null)
number of ops:  11
compiled vars:  !0 = $email, !1 = $checked
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, 'this+is+a+valid+address+dannimoring%40yahoo.com'
   3     1        INIT_FCALL                                               'filter_var'
         2        SEND_VAR                                                 !0
         3        SEND_VAL                                                 274
         4        DO_ICALL                                         $3      
         5        ASSIGN                                                   !1, $3
   4     6        INIT_FCALL                                               'var_dump'
         7        SEND_VAR                                                 !0
         8        SEND_VAR                                                 !1
         9        DO_ICALL                                                 
        10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0