Bu Fonksiyonu Bilen Var mı ?

ctype_alnum($string);

<?php
function alphanumeric($string){
$string = preg_replace("/[^a-zA-Z0-9\s]/", "", $string);
return $string;
}
?>

function cs($string)
{
if(  ( function_exists("get_magic_quotes_gpc") && get_magic_quotes_gpc() ) )
{
$string = stripslashes($string); 
}
elseif(!get_magic_quotes_gpc())
{
$string = addslashes($string);
}
$string = @mysql_real_escape_string($string);
return $string;
};