PHP function to cleanup/re-encode a URL

url_cleaner.php

<?php

$url = 'http://foo.com/path with spaces/index.php?something=something else#foo-29 32';

$reencode_url = function ($url) {
    $url_parts = parse_url($url);

    // Add scheme
    $scheme = array_key_exists('scheme', $url_parts)? $url_parts['scheme']: 'http';
    $new_url = "$scheme://";

    // Add authentication
    if (array_key_exists('user', $url_parts) && array_key_exists('pass', $url_parts)) {
        $new_url .= rawurlencode($url_parts['user']).":".rawurlencode($url_parts['pass']).'@';
    }

    // Add host
    $new_url .= $url_parts['host'];
    if (array_key_exists('port', $url_parts)) {
        $new_url .= ':'.$url_parts['port'];
    }

    // Add path
    $path = array_key_exists('path', $url_parts)? $url_parts['path']: '/';
    $path = implode('/', array_map('rawurlencode', explode('/', $path)));
    $new_url .= $path;

    // Add query string
    if (array_key_exists('query', $url_parts)) {
        $query = '';
        parse_str($url_parts['query'], $query);
        $new_url .= '?'.http_build_query($query);
    }

    // Add fragment
    if (array_key_exists('fragment', $url_parts)) {
        $new_url .= '#'.rawurlencode($url_parts['fragment']);
    }

    return $new_url;
}

echo $reencode_url($url);
// http://foo.com/path%20with%20spaces/index.php?something=something+else#foo-29%2032