str_slug.php

gistfile1.txt

function str_slug($title, $separator = '-') {
        // Convert all dashes/underscores into separator
        $flip = $separator == '-' ? '_' : '-';

        $title = preg_replace('!['.preg_quote($flip).']+!u', $separator, $title);

        // Replace @ with the word 'at'
        $title = str_replace('@', $separator.'at'.$separator, $title);

        // Remove all characters that are not the separator, letters, numbers, or whitespace.
        $title = preg_replace('![^'.preg_quote($separator).'\pL\pN\s]+!u', '', mb_strtolower($title));

        // Replace all separator characters and whitespace by a single separator
        $title = preg_replace('!['.preg_quote($separator).'\s]+!u', $separator, $title);

        return trim($title, $separator);
}