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<?php $exprs = [ '/[=foo=]/', '/[:foo:]/', '/[.foo.]/', ]; foreach ($exprs as $expr) { echo $expr . "\n"; preg_match($expr, 'foo'); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 10
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 10
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/BIvtd
function name:  (null)
number of ops:  12
compiled vars:  !0 = $exprs, !1 = $expr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    9     1      > FE_RESET_R                                       $3      !0, ->10
          2    > > FE_FETCH_R                                               $3, !1, ->10
   10     3    >   CONCAT                                           ~4      !1, '%0A'
          4        ECHO                                                     ~4
   11     5        INIT_FCALL                                               'preg_match'
          6        SEND_VAR                                                 !1
          7        SEND_VAL                                                 'foo'
          8        DO_ICALL                                                 
    9     9      > JMP                                                      ->2
         10    >   FE_FREE                                                  $3
   12    11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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