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<?php echo($_SERVER['SERVER_NAME']); $a = 'opt.site.com'; $b = strpos($a, 'opt.'); if($b === 0) { echo 'pos 0'; } else { echo 'error!'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 13
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aWMF4
function name:  (null)
number of ops:  15
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   FETCH_R                      global              ~2      '_SERVER'
          1        FETCH_DIM_R                                      ~3      ~2, 'SERVER_NAME'
          2        ECHO                                                     ~3
    3     3        ASSIGN                                                   !0, 'opt.site.com'
    4     4        INIT_FCALL                                               'strpos'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 'opt.'
          7        DO_ICALL                                         $5      
          8        ASSIGN                                                   !1, $5
    5     9        IS_IDENTICAL                                             !1, 0
         10      > JMPZ                                                     ~7, ->13
    6    11    >   ECHO                                                     'pos+0'
         12      > JMP                                                      ->14
    8    13    >   ECHO                                                     'error%21'
    9    14    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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