Create a slug from any string

gistfile1.php

<?php

class Slug {
	private function slugify($slug)
	{
		// convert all dodgey foreign characters
		$table = array(
		    'Š'=>'S', 'š'=>'s', 'Đ'=>'Dj', 'đ'=>'dj', 'Ž'=>'Z', 'ž'=>'z', 'Č'=>'C', 'č'=>'c', 'Ć'=>'C', 'ć'=>'c',
		    'À'=>'A', 'Á'=>'A', 'Â'=>'A', 'Ã'=>'A', 'Ä'=>'A', 'Å'=>'A', 'Æ'=>'A', 'Ç'=>'C', 'È'=>'E', 'É'=>'E',
		    'Ê'=>'E', 'Ë'=>'E', 'Ì'=>'I', 'Í'=>'I', 'Î'=>'I', 'Ï'=>'I', 'Ñ'=>'N', 'Ò'=>'O', 'Ó'=>'O', 'Ô'=>'O',
		    'Õ'=>'O', 'Ö'=>'O', 'Ø'=>'O', 'Ù'=>'U', 'Ú'=>'U', 'Û'=>'U', 'Ü'=>'U', 'Ý'=>'Y', 'Þ'=>'B', 'ß'=>'Ss',
		    'à'=>'a', 'á'=>'a', 'â'=>'a', 'ã'=>'a', 'ä'=>'a', 'å'=>'a', 'æ'=>'a', 'ç'=>'c', 'è'=>'e', 'é'=>'e',
		    'ê'=>'e', 'ë'=>'e', 'ì'=>'i', 'í'=>'i', 'î'=>'i', 'ï'=>'i', 'ð'=>'o', 'ñ'=>'n', 'ò'=>'o', 'ó'=>'o',
		    'ô'=>'o', 'õ'=>'o', 'ö'=>'o', 'ø'=>'o', 'ù'=>'u', 'ú'=>'u', 'û'=>'u', 'ý'=>'y', 'ý'=>'y', 'þ'=>'b',
		    'ÿ'=>'y', 'Ŕ'=>'R', 'ŕ'=>'r',
		);
		$slug = strtr($slug, $table);
	
		// replace any remaining non letter or digits by -
		$slug = preg_replace('~[^\\pL\d]+~u', '-', $slug);
		
		// trim
		$slug = trim($slug, '-');
		
		// transliterate
		$slug = iconv('utf-8', 'us-ascii//TRANSLIT', $slug);
		
		// lowercase
		$slug = strtolower($slug);
		
		// remove unwanted characters
		$slug = preg_replace('~[^-\w]+~', '', $slug);
		
		return empty($slug) ? NULL : $slug;
	}
}