3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mails = array( 'a.yamada@yamada.com', 'a.yamada@sub.yamada.com', 'a.yamada@sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@yamada.net', 'a.yamada@sub.yamada.net', 'a.yamada@sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', ); foreach ($mails as $mail) { if (preg_match('/@([^.]+\.){0,}yamada\.com$/', $mail)) { echo "${mail} -> DISCARD\n"; } else { echo "${mail} -> OK\n"; } }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 16
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 16
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 15
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
filename:       /in/sALFQ
function name:  (null)
number of ops:  18
compiled vars:  !0 = $mails, !1 = $mail
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   15     1      > FE_RESET_R                                       $3      !0, ->16
          2    > > FE_FETCH_R                                               $3, !1, ->16
   16     3    >   INIT_FCALL                                               'preg_match'
          4        SEND_VAL                                                 '%2F%40%28%5B%5E.%5D%2B%5C.%29%7B0%2C%7Dyamada%5C.com%24%2F'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                         $4      
          7      > JMPZ                                                     $4, ->12
   17     8    >   NOP                                                      
          9        FAST_CONCAT                                      ~5      !1, '+-%3E+DISCARD%0A'
         10        ECHO                                                     ~5
         11      > JMP                                                      ->15
   19    12    >   NOP                                                      
         13        FAST_CONCAT                                      ~6      !1, '+-%3E+OK%0A'
         14        ECHO                                                     ~6
   15    15    > > JMP                                                      ->2
         16    >   FE_FREE                                                  $3
   21    17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.79 ms | 1395 KiB | 15 Q