Generate a url slug
From CodeCodex
A "slug" is a url that is generated given some text (for example, a webpage title) so that the url for a given item is readable for humans.
For example, the url at a store for blue pens, domain/?id=123 could use a slug to make it human readable, domain/blue-pens?id=123 or simply domain/blue-pens
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Implementations
Java
package util; import java.text.Normalizer; import java.text.Normalizer.Form; import java.util.Locale; import java.util.regex.Pattern; public class Slug { private static final Pattern NONLATIN = Pattern.compile("[^\\w-]"); private static final Pattern WHITESPACE = Pattern.compile("[\\s]"); public String makeSlug(String input) { String nowhitespace = WHITESPACE.matcher(input).replaceAll("-"); String normalized = Normalizer.normalize(nowhitespace, Form.NFD); String slug = NONLATIN.matcher(normalized).replaceAll(""); return slug.toLowerCase(Locale.ENGLISH); } }
Perl
my $input = 'In C#: How do I add "Quotes" around string in a comma delimited list of strings?'; my $length = 20; $input =~ s/[^a-z0-9]+/-/gi; $input =~ s/^(.{1,$length}).*/\L$1/; print "$input\n";
Ruby
def seo_friendly(str) str.strip.downcase.gsub /\W+/, '-' end
Python
Using django.
from django.template.defaultfilters import slugify slugify('In C#: How do I add "Quotes" around string in a comma delimited list of strings?')
C#
private string ToSeoFriendly(string title, int maxLength) { var match = Regex.Match(title.ToLower(), "[\\w]+"); StringBuilder result = new StringBuilder(""); bool maxLengthHit = false; while (match.Success && !maxLengthHit) { if (result.Length + match.Value.Length <= maxLength) { result.Append(match.Value + "-"); } else { maxLengthHit = true; // Handle a situation where there is only one word and it is greater than the max length. if (result.Length == 0) result.Append(match.Value.Substring(0, maxLength)); } match = match.NextMatch(); } // Remove trailing '-' if (result[result.Length - 1] == '-') result.Remove(result.Length - 1, 1); return result.ToString(); }
PHP
function generateUrlSlug($string, $maxlen=0) { $string = trim(preg_replace('/[^a-z0-9]+/', '-', strtolower($string)), '-'); if ($maxlen && strlen($string) > $maxlen) { $string = substr($string, 0, $maxlen); $pos = strrpos($string, '-'); if ($pos > 0) { $string = substr($string, 0, $pos); } } return $string; }