Question

Similar to this question: How to get the last path in a URL?

…Except instead of returning only the last path in the URL, I want to return the last four:

<?php 
  $url = 'http://blogs.mydomain.com/blog-name/2012/04/21/title-of-the-blog-post';
  print_r(parse_url($url));
  $url_path = parse_url($url, PHP_URL_PATH);
  $parts = explode('/', $url_path);
  $relative_permalink = end($parts);
echo $relative_permalink;
?>

The code above is from the earlier Stack Overflow item I linked to. It kind of does what I want, except it returns only title-of-blog-post; I want to return everything after /blog-name/, like this:

/20120/04/21/title-of-blog-post

This code also sort of gets me there:

$url_endpoint = http://blogs.mydomain.com/blog-name/2012/04/21/title-of-the-blog-post;
$url_endpoint = parse_url( $url_endpoint );
$url_endpoint = $url_endpoint['path'];

Except that it also returns /blog-name/ and everything after it. I want to exclude /blog-name/

Any ideas for how I can manipulate either of these snippets?

Answer 1

Try array_slice:

$relative_permalink = array_slice($parts, -4);

–Update–

$url = 'http://blogs.mydomain.com/blog-name/2012/04/21/blog-title/';
$url_path = parse_url($url, PHP_URL_PATH);

// We are exploding on /, so there may be some empty array elements
// passing them through array_filter will remove them
$parts = array_filter(explode('/', $url_path), 'strlen');

// Grab the last 4 elements of array
$relative_permalink = array_slice($parts, -4);

// Put humpty back together again
echo implode('/', $relative_permalink);

Your question had a hard req of the last 4, which this will accomplish, however Blair McMillan’s answer is more flexible as it will allow you to take anything after ‘blog-name’, so keep that in mind.