PHP Function create SEO URL Friendly

PHP Function create SEO URL Friendly

strtlower make string lowercase preg_replace remove all unwanted character spaces and dashes

<?php
function seo_url($string, $seperator='-') {
   $string = strtolower($string);
   $string = preg_replace("/[^a-z0-9_\s-]/", $seperator, $string);
   $string = preg_replace("/[\s-]+/", " ", $string);
   $string = preg_replace("/[\s_]/", $seperator, $string);
   return $string;
}
$teststring = "PHP Function create SEO URL Friendly";
$seofrieldy = seo_url($teststring);
echo "www.tutorial.com/$seofrieldy/";
?>