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<?php function is_valid_time_domain( $url ) { $whitelisted_domains = array( 'mydomain.com', 'mydomain.net' ); $domain = parse_url( $url, PHP_URL_HOST ); // Check if we match the domain exactly if ( in_array( $domain, $whitelisted_domains ) ) { return true; } foreach( $whitelisted_domains as $whitelisted_domain ) { $whitelisted_domain = '.' . $whitelisted_domain; // Prevent things like 'evilsitetime.com' if( strpos( $domain, $whitelisted_domain ) === ( strlen( $domain ) - strlen( $whitelisted_domain ) ) ) { return true; break; } } return false; } $domains = array( /*'http://mydomain.com', 'http://www.mydomain.com', 'http://mydomain.com.evilsite.com', 'http://mydomain.com.mydomain.net', 'http://evilsitemydomain.com', 'http://mydomain.com.evil%45site.com', 'http://evil%45sitemydomain.com', 'http://evil%00sitemydomain.com', 'http://mydomain.com.evil%00site.com','http://evilsite.com/.mydomain.com', 'http://mydomain.com%00.evilsite.com', 'http://evilsite.com#.mydomain.com', 'http://evilsite.com@mydomain.com', 'http://mydomain.com@evilsite.com', 'http://evilsite.com@#mydomain.com', 'http://evilsite.com:mydomain.com', 'file://stuff@myfile:mydomain.com', 'file:///dev@mydomain.com', 'file:///dev?@mydomain.com', 'file:///dev?mydomain.com', 'http:mydomain.com', 'http:evilsite.com//mydomain.com', 'http:mydomain.com//evilsite.com', 'http:mydomain.com', 'http://[2010:836B:4179::836B:4179].mydomain.com', 'http://evilsite.com+mydomain.com', 'http://mydomain.com+evilsite.com', 'http://%6Dydomain.com', 'http://evilsite$mydomain.com', 'http://evilsite;mydomain.com', 'http://%1B.mydomain.com/', 'http://%1Bmydomain.com/', 'http://mydom ain.com', 'http://my domain.com', 'http://mydomain.com.eu', 'http://"mydomain.com', 'http://".mydomain.com', 'http://%22.mydomain.com',*/ 'http://£.mydomain.com', 'http://example.com£mydomain.com', 'http://example.com£%2Emydomain.com', 'http://%00.mydomain.com', 'http://%00mydomain.com', 'data://text%2Fhtml%2C%3Ch1%3EHello%2C%20World!%3C%2Fh1%3E.mydomain.com', 'feed://http://mydomain.com'); foreach( $domains as $domain ) { echo $domain . "\n"; var_dump( is_valid_time_domain( $domain ) ); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 12
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 12
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/sfPUW
function name:  (null)
number of ops:  14
compiled vars:  !0 = $domains, !1 = $domain
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   21     0  E >   ASSIGN                                                   !0, <array>
   23     1      > FE_RESET_R                                       $3      !0, ->12
          2    > > FE_FETCH_R                                               $3, !1, ->12
   24     3    >   CONCAT                                           ~4      !1, '%0A'
          4        ECHO                                                     ~4
   25     5        INIT_FCALL                                               'var_dump'
          6        INIT_FCALL                                               'is_valid_time_domain'
          7        SEND_VAR                                                 !1
          8        DO_FCALL                                      0  $5      
          9        SEND_VAR                                                 $5
         10        DO_ICALL                                                 
   23    11      > JMP                                                      ->2
         12    >   FE_FREE                                                  $3
   26    13      > RETURN                                                   1

Function is_valid_time_domain:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 13
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
2 jumps found. (Code = 77) Position 1 = 14, Position 2 = 30
Branch analysis from position: 14
2 jumps found. (Code = 78) Position 1 = 15, Position 2 = 30
Branch analysis from position: 15
2 jumps found. (Code = 43) Position 1 = 26, Position 2 = 29
Branch analysis from position: 26
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 29
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 30
filename:       /in/sfPUW
function name:  is_valid_time_domain
number of ops:  33
compiled vars:  !0 = $url, !1 = $whitelisted_domains, !2 = $domain, !3 = $whitelisted_domain
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        ASSIGN                                                   !1, <array>
    4     2        INIT_FCALL                                               'parse_url'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 1
          5        DO_ICALL                                         $5      
          6        ASSIGN                                                   !2, $5
    7     7        INIT_FCALL                                               'in_array'
          8        SEND_VAR                                                 !2
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                         $7      
         11      > JMPZ                                                     $7, ->13
    8    12    > > RETURN                                                   <true>
   11    13    > > FE_RESET_R                                       $8      !1, ->30
         14    > > FE_FETCH_R                                               $8, !3, ->30
   12    15    >   CONCAT                                           ~9      '.', !3
         16        ASSIGN                                                   !3, ~9
   13    17        INIT_FCALL                                               'strpos'
         18        SEND_VAR                                                 !2
         19        SEND_VAR                                                 !3
         20        DO_ICALL                                         $11     
         21        STRLEN                                           ~12     !2
         22        STRLEN                                           ~13     !3
         23        SUB                                              ~14     ~12, ~13
         24        IS_IDENTICAL                                             $11, ~14
         25      > JMPZ                                                     ~15, ->29
   14    26    >   FE_FREE                                                  $8
         27      > RETURN                                                   <true>
   15    28*       JMP                                                      ->30
   11    29    > > JMP                                                      ->14
         30    >   FE_FREE                                                  $8
   18    31      > RETURN                                                   <false>
   19    32*     > RETURN                                                   null

End of function is_valid_time_domain

Generated using Vulcan Logic Dumper, using php 8.0.0


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