SEO URL Friendly

Description :
To make url seo friendly


Function :
function seo($url,$sparate='-') {
$url = strtolower($url);
$filter = array('!','@','#','$','%','^','&','*','(',')','-','+','=','|','~');
$fisrt = str_replace($filter," ",$url);
$second = stripslashes($fisrt);
$third = str_replace(array("    ","   ","  ")," ",$second);
$fourth = str_replace(" ",$sparate,$third);
$fifth = trim($fourth);
return trim($fifth);
}