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<?php $fullname = 'Joe Blow'; if (preg_match('/^ (\S+) # firstname/alias \s+ \S+ # surname $/x', $fullname, $matches)) { print $matches[1] . "\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/jh4EJ
function name:  (null)
number of ops:  11
compiled vars:  !0 = $fullname, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Joe+Blow'
    4     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E%0A%09%28%5CS%2B%29%09%23+firstname%2Falias%0A%09%5Cs%2B%0A%09%5CS%2B%09%23+surname%0A%24%2Fx'
    8     3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                         $3      
          6      > JMPZ                                                     $3, ->10
    9     7    >   FETCH_DIM_R                                      ~4      !1, 1
          8        CONCAT                                           ~5      ~4, '%0A'
          9        ECHO                                                     ~5
   10    10    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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