<?
function validate_search_string($s) 
{
	//exclude special SQL symbols
	$s = str_replace("%"," ",$s);
	$s = str_replace("_"," ",$s);
	//",',\
	
	$s = htmlspecialchars(stripslashes($s));
	$s = str_replace("'","\'",$s);
	return $s;

} //validate_search_string

function string_encode($s) // encodes a string with a simple algorythm
{
	$result = base64_encode($s);
	return $result;
}

function string_decode($s) // decodes a string encoded with string_encode()
{
	$result = base64_decode($s);
	return $result;
}
function numpages($NN)
{          $Query="SELECT * FROM gb WHERE gb_adm=0";
        $result1=mysql_query($Query) or DIE ("SELECT ERROR! ".MYSQL_ERROR());

   $mess=mysql_num_rows($result1);
    $pages = ceil(((mysql_num_rows($result1)))/$NN);

return $pages;

function isemail($string)
  {
    return ereg(
          '^([a-zA-Z0-9_]|-|.)+'.
          '@'.
          '([a-zA-Z0-9_]|-|.)+'.
          '[a-zA-Z]{2,4}$',
          $string);
  };
};?>