To covert a string to SEO friendly Slug-URL

sluggify.php

<?php

/* Sluggify - Simple Logic to turn a string to slug url
 * To covert a string to SEO friendly
 */
 
$title = "To covert a string to SEO friendly"

$slugs = preg_replace('/\%/',' percentage',$title);
$slugs = preg_replace('/\@/',' at ',$slugs);
$slugs = preg_replace('/\&/',' and ',$slugs);
$slugs = preg_replace('/\s[\s]+/','-',$slugs);    // Strip off multiple spaces
$slugs = preg_replace('/[\s\W]+/','-',$slugs);    // Strip off spaces and non-alpha-numeric
$slugs = preg_replace('/^[\-]+/','',$slugs);      // Strip off the starting hyphens
$slugs = preg_replace('/[\-]+$/','',$slugs);      // Strip off the ending hyphens
$slugs = strtolower($slugs);

echo $slugs;

//output: this-is-the-string-to-be-made-seo-friendly
?>