//
//   Convert Text to 'Safe Url'
//

// Mark Jacksons Function
function safeURL($txt,$allowSpace=false,$allowCaps=false) {
	$find = array('/à|á|â|ã|ä|å/', '/ç/', '/è|é|ê|ë/', '/ì|í|î|ï/', '/ñ/', '/ð|ó|ò|ô|õ|ö|ø/', '/ù|ú|û|ü/', '/ý|ÿ/');
	$replace = array('a', 'c', 'e', 'i', 'n', 'o', 'u', 'y');
	$txt = trim($txt);
	$txt = preg_replace($find,$replace,$txt);
	if(!$allowSpace) { $txt = str_replace(' ','-',$txt); }
	// remove all other unwanted characters
	if(!$allowCaps) { $txt = strtolower($txt); }
	$pattern = ($allowCaps) ? '/[^a-zA-Z0-9\s_\-]/' : '/[^a-z0-9\s_\-]/';
	$txt = preg_replace($pattern,'',$txt);
	return $txt;
}

This function was written by the mighty Mark Jackson

You use it like: $myvar = safeURL(‘Joe Blogs Bio Page’); which produces joe-blogs-bio-page