[php] cezar-decrypt

<?php
$key = 11;
$vhod = 'YL LOKUPKUEDBTKJUEDBLU';
$abeceda = array(1=>'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',' ');

$niz = strtoupper($vhod);
$array = str_split($niz);

foreach($array as $index => $element)
{
   $value = array_search($element, $abeceda);//crke zamenjamo s številkami
   $value = $value - $key;

   if($value <= 0)
   {
      $value = $value + count($abeceda);
   }

   $hash = $abeceda[$value];
   $output[] = $hash;

}

foreach($output as $index => $element)
{
   if($element == null)
   {
   $output[$index] = ' ';
   }
}

$izpis = implode('',$output);
echo $izpis;
?>