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  <? Php 
      Dirty paths: \n " ; echo "\ n \ n bruts camins: \ n"; 
  = 'C://////////Windows//////System' ; //  C:/System $ Camins [] = 'C :////////// ////// Windows System; / / C: / Sistema d' 
  = 'C:\HTML\javascript\..\examples\colors.html' ; //  C:/HTML/examples/colors.html $ Camins [] = 'C: \ HTML \ JavaScript \ .. \ exemples \ colors.html'; / / C: / HTML / exemples / colors.html 
  = '/root/./wwwroot/scripts/../././webpage' ; //  /root/wwwroot/webpage $ Camins [] = '/ root /. / Wwwroot / scripts / .. /. /. / Pàgina web' / / / root / wwwroot / pàgina web 
  = 'wwwroot/webpage/../index.php?querystring' ; //  wwwroot/index.php?querystring $ Camins [] = 'wwwroot / web / .. / index.php? QueryString'; / / wwwroot / index.php? QueryString 
  = 'http://www.php.net/manual/en/../../downloads' ; //  http://www.php.net/downloads $ Camins [] = 'http://www.php.net/manual/en/../../downloads'; / / http://www.php.net/downloads 
  = 'http://www.php.net/downloads/test/test1/test2//./docs.php' ; //  http://www.php.net/docs.php $ Camins [] = 'http://www.php.net/downloads/test/test1/test2//./docs.php'; / / http://www.php.net/docs.php 
  = '../downloads/../docs.php' ; //  ../docs.php $ Camins [] = '.. / descàrregues / .. / docs.php'; / / .. / docs.php 
  = 'localhost//projetos/../_arquivos/../' ; //   "" $ Camins [] = 'localhost / / Projectes / .. / _arquivos /../'; / / "" 
  = 'C:/downloads/../../../' ; //  C:/ $ Camins [] = 'C: / descàrregues /../../../'; / / C: / 
  = 'downloads/../../../' ; //  ../../ $ Camins [] = 'descàrregues /../../../'; / / ../../ 

  $paths as $path ) foreach ($ camins com $ PATH) 
  ( 
      &quot;" . $path . "&quot;  =  &quot;" .  fixpath ( $path ) . "&quot;" ; echo "\ n" ". $ PATH". "=" ". fixpath ($ PATH)". ""; 
  ) 
  ?> 

  <? Php 
  $path = "" ) funció fixpath ($ path = "") 
  ( 
      / / Comprovar Sanitat 
      $path == "" ) { return false ; } if ($ camí == "") (return false;) 

      / / Converteix tots els "\" a "/", i esborra els espais en blanc al començament i al final de la cadena 
      trim ( preg_replace ( "/ \\ \\ /" , "/" , ( string ) $path ) ) ; $ Path = trimestre (preg_replace ( "/ \ \ /", "/", (string) $ ruta)); 

      / * Escapades de la cadena original en parts: "root" i "dir". 
      * "Arrel" pot ser "C: /" (Windows), "/" (Linux) o "http://www.something.com/" (URL). Aquest serà l'inici de la cadena de producció. 
      * "Dir" pot ser "Windows / System", "root / html / exemples /", "includes / classes / class.validator.php", etc 
      * / 
      "/^( \\ /| \w : \\ /|(http|ftp)s?: \\ / \\ /[^ \\ /]+ \\ /)?(.*)$/i" , $path , $matches ,  PREG_SET_ORDER ) ; preg_match_all ( "/ ^ (\ \ / | \ w: \ \ / | (http | ftp) s?: \ \ / \ \ / [^ \ \ /] + \ \ /)?(.*)$/ i ", $ PATH, $ coincidències, PREG_SET_ORDER); 

      $matches [ 0 ] [ 1 ] ; Path_root $ = $ coincidències [0] [1]; 
      $matches [ 0 ] [ 3 ] ; Path_dir $ = $ coincidències [0] [3]; 

      / / Si "dir" part té una o més barres al principi, esborra tots. 
      preg_replace ( array ( "/^ \\ /+/" ) , array ( "" ) , $path_dir ) ; $ Path_dir = preg_replace (array ( "/ ^ \ \ / + /"), array ( ""), $ path_dir); 

      / / Escapades de "dir" part a cada barra 
      explode ( "/" , $path_dir ) ; $ Path_parts explotar = ( "/", $ path_dir); 

      / / Crea un nou array amb el camí correcte. Cada element és un nou directori (o arxiu en què acaba, si existeix) en seqüència. 
      $i = $j = 0 , $real_path_parts = array ( ) ; $i < count ( $path_parts ) ; $i ++ ) for ($ i = $ j = 0, $ real_path_parts = array (); $ i <count ($ path_parts); $ i + +) 
      ( 
          $path_parts [ $i ] == '.' ) if ($ path_parts [$ i] ==''). 
          ( 
              continuar; 
          ) 
          $path_parts [ $i ] == '' ) && ( $i != ( count ( $path_parts ) - 1 ) ) ) else if (($ path_parts [$ i] =='') & & ($ i! = (count ($ path_parts) - 1))) 
          ( 
        	  array ( ) ; $ Real_path_parts = array (); 
        	  0 ; $ J = 0; 
        	  continuar; 
           ) 
          $path_parts [ $i ] == '..' ) else if ($ path_parts [$ i] =='..') 
          ( 
              isset ( $real_path_parts [ $j - 1 ] ) && $real_path_parts [ $j - 1 ] != '..' )   || ( $path_root != "" ) ) if ((isset ($ real_path_parts [$ j - 1]) & & $ real_path_parts [$ j - 1 ]!'..') = | | ($ path_root! = "")) 
              ( 
                  $real_path_parts ) ; array_pop ($ real_path_parts); 
                  $ J -; 
                  continuar; 
              ) 
          ) 

          $real_path_parts , $path_parts [ $i ] ) ; array_push ($ real_path_parts, $ path_parts [$ i]); 
          $ J + +; 
      ) 
      . implode ( "/" , $real_path_parts ) ; return $ path_root. implosió ( "/", $ real_path_parts); 
  ) 
  ?>