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<html>
<head>
<title>Online PHP Script Execution</title>
</head>
<body>
<?php
 $cryptage = array(1 => array(0 => "Ligne 1"),2 =>array(0 => "Ligne 2"), 3 => array(0 => "Ligne 3"),
 4 => array(0 => "Ligne 4"),5 => array(0 => "Ligne 5"));
 $alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t',"u/v",'w','x','y','z'];
 shuffle($alphabet);
 /*print_r($alphabet);*/
 foreach($alphabet as $key => $value)
 {
        if($key <5)
    {$cryptage[1][] = $alphabet[$key];}
        else if ($key <10)
    {$cryptage[2][] = $alphabet[$key];}
     else if ($key <15)
    {$cryptage[3][] = $alphabet[$key];}
     else if ($key <20)
    {$cryptage[4][] = $alphabet[$key];}
    else
    {$cryptage[5][] = $alphabet[$key];}
 }
 print_r($cryptage);
 
  $message = "bouteille.";
  $message_clean= str_replace(".", "", $message);
  $message_tab = str_split($message_clean);
  
  crypt_message($message_tab,$cryptage);
  
  
  /* cryptage */
  
  function crypt_message($message,$cryptage)
  {
      
      $crypted_message = array();
      foreach($message as $key => $value)
      {
          if($message[$key] == 'u' || $message[$key] == 'v')
              {
                  $dizaine = searchForId("u/v",$cryptage);
                    $unite = array_search("u/v",$cryptage[$dizaine]);
                     $dizaine = $dizaine * 10;
                  $crypted_message[]= $dizaine + $unite;
              }
            else{      
          $dizaine = searchForId($message[$key],$cryptage);
          $unite = array_search($message[$key],$cryptage[$dizaine]);
          $dizaine = $dizaine * 10;
          $crypted_message[] = $dizaine + $unite;
            }
      }
      
      echo "Message code : ";
      print_r($crypted_message);
      decrypt_message($crypted_message,$cryptage);
  }
  
  /* decryptage */
  
  function decrypt_message($crypted, $cryptage)
  {
      $decrypted_message = array();
      
      foreach($crypted as $key => $value)
      {
          $unite = $crypted[$key] % 10;
          $dizaine = ($crypted[$key] - $unite) / 10;
          $decrypted_message[] = $cryptage[$dizaine][$unite];
      }
      
      
      echo "Message decode :";
      print_r($decrypted_message);
  }
  
  
  
  /* recherche multidimensionnelle */
  
  function searchForId($id, $array) {
   foreach ($array as $key => $val) {
           if ($val[1] === $id || $val[2] === $id || $val[3] === $id || $val[4] === $id || $val[5] === $id) {
               return $key;
           }
   }
   return null;
}


 
 ?>
</body>
</html>
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