ref: http://flask.pocoo.org/snippets/5/

generating_slugs.py

import re
from unicodedata import normalize

_punct_re = re.compile(r'[\t !"#$%&\'()*\-/<=>?@\[\\\]^_`{|},.]+')

def slugify(text, delim=u'-'):
    """Generates an slightly worse ASCII-only slug."""
    result = []
    for word in _punct_re.split(text.lower()):
        word = normalize('NFKD', word).encode('ascii', 'ignore')
        if word:
            result.append(word)
    return unicode(delim.join(result))

gistfile1.php

<?php

function slugify($text, $delim='-') {
    $results = [];

    if (preg_match_all('/[0-9A-Za-z\x{00C0}-\x{00ff}]+/u', $text, $matchtes)) {                                                                                                                                        foreach($matchtes[0] as $part) {
            if ($p = iconv('utf8', 'ascii//TRANSLIT', $part)) {
                array_push($results, strtolower($p));
            }
        }                                                                                                                                                                                                          }

    return implode($delim, $results);                                                                                                                                                                          }
}