slugify.php

function slugify($string){
	// /[^A-Za-z0-9-]+/
	//     $final_string = strtolower(trim(preg_replace('/[^A-Za-z0-9-]+/', '-', $string), '-'));
	
	//	Get rid of multiple spaces
	$final_string = str_ireplace('  ', ' ', $string);

	//	target all alphanumerics
	//	https://stackoverflow.com/a/17947853/6784304
	$replace_pattern = '/\W|_/';
    $final_string = strtolower(trim(preg_replace($replace_pattern, '-', $final_string), '-'));

	//	get rid of multiple hyphens because I'm OCD about this sort of thing
	//	https://stackoverflow.com/a/29865564/6784304	
    $final_string = preg_replace('/-+/', '-', $final_string);
    
    return $final_string;
}