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<?php $subject = "AWB012345"; $result = strpos($subject, "AWB0") === 0; var_dump($result); $subject = "12345"; $result = strpos($subject, "AWB0") === 0; var_dump($result); $subject = "AWB012345"; $result = substr($subject, 0, 4) == "AWB0"; var_dump($result); $subject = "12345"; $result = substr($subject, 0, 4) == "AWB0"; var_dump($result);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4eVT3
function name:  (null)
number of ops:  43
compiled vars:  !0 = $subject, !1 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'AWB012345'
    4     1        INIT_FCALL                                               'strpos'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 'AWB0'
          4        DO_ICALL                                         $3      
          5        IS_IDENTICAL                                     ~4      $3, 0
          6        ASSIGN                                                   !1, ~4
    5     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
    7    10        ASSIGN                                                   !0, '12345'
    8    11        INIT_FCALL                                               'strpos'
         12        SEND_VAR                                                 !0
         13        SEND_VAL                                                 'AWB0'
         14        DO_ICALL                                         $8      
         15        IS_IDENTICAL                                     ~9      $8, 0
         16        ASSIGN                                                   !1, ~9
    9    17        INIT_FCALL                                               'var_dump'
         18        SEND_VAR                                                 !1
         19        DO_ICALL                                                 
   13    20        ASSIGN                                                   !0, 'AWB012345'
   14    21        INIT_FCALL                                               'substr'
         22        SEND_VAR                                                 !0
         23        SEND_VAL                                                 0
         24        SEND_VAL                                                 4
         25        DO_ICALL                                         $13     
         26        IS_EQUAL                                         ~14     $13, 'AWB0'
         27        ASSIGN                                                   !1, ~14
   15    28        INIT_FCALL                                               'var_dump'
         29        SEND_VAR                                                 !1
         30        DO_ICALL                                                 
   17    31        ASSIGN                                                   !0, '12345'
   18    32        INIT_FCALL                                               'substr'
         33        SEND_VAR                                                 !0
         34        SEND_VAL                                                 0
         35        SEND_VAL                                                 4
         36        DO_ICALL                                         $18     
         37        IS_EQUAL                                         ~19     $18, 'AWB0'
         38        ASSIGN                                                   !1, ~19
   19    39        INIT_FCALL                                               'var_dump'
         40        SEND_VAR                                                 !1
         41        DO_ICALL                                                 
         42      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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