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<?php $subject = "foo"; $exprs = [ '/foo/', '(foo)', '{foo}', '[foo]', '<foo>', ]; foreach ($exprs as $expr) { var_dump(preg_match($expr, $subject)); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 12
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 12
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/bcnqH
function name:  (null)
number of ops:  14
compiled vars:  !0 = $subject, !1 = $exprs, !2 = $expr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'foo'
    4     1        ASSIGN                                                   !1, <array>
   12     2      > FE_RESET_R                                       $5      !1, ->12
          3    > > FE_FETCH_R                                               $5, !2, ->12
   13     4    >   INIT_FCALL                                               'var_dump'
          5        INIT_FCALL                                               'preg_match'
          6        SEND_VAR                                                 !2
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $6      
          9        SEND_VAR                                                 $6
         10        DO_ICALL                                                 
   12    11      > JMP                                                      ->3
         12    >   FE_FREE                                                  $5
   14    13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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