Javascript Slugify

slugify.js

function slugify(text) {
  return text.toString().toLowerCase()
    .replace(/\s+/g, '-')           // Replace spaces with -
    .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
    .replace(/\-\-+/g, '-')         // Replace multiple - with single -
    .replace(/^-+/, '')             // Trim - from start of text
    .replace(/-+$/, '');            // Trim - from end of text
}

slugify.php

function slugify($string) {
    $string = strtolower($string);
    $string = preg_replace('/\s+/', '-', $string); // Replace spaces with -
    $string = preg_replace('/[^\w\-]+/', '', $string); // Remove all non-word chars
    $string = preg_replace('/\-\-+/', '-', $string); // Replace multiple - with single -
    $string = preg_replace('/^-+/', '', $string); // Trim - from start of text
    $string = preg_replace('/-+$/', '', $string); // Trim - from end of text

    return preg_replace('/[^A-Za-z0-9-]+/', '-', $string);
}