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JavaScript parse_url function

A JavaScript equivalent of PHP’s parse_url

url/parse_url.js raw on github
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function parse_url(str, component) {
  //       discuss at: http://phpjs.org/functions/parse_url/
  //      original by: Steven Levithan (http://blog.stevenlevithan.com)
  // reimplemented by: Brett Zamir (http://brett-zamir.me)
  //         input by: Lorenzo Pisani
  //         input by: Tony
  //      improved by: Brett Zamir (http://brett-zamir.me)
  //             note: original by http://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
  //             note: blog post at http://blog.stevenlevithan.com/archives/parseuri
  //             note: demo at http://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
  //             note: Does not replace invalid characters with '_' as in PHP, nor does it return false with
  //             note: a seriously malformed URL.
  //             note: Besides function name, is essentially the same as parseUri as well as our allowing
  //             note: an extra slash after the scheme/protocol (to allow file:/// as in PHP)
  //        example 1: parse_url('http://username:password@hostname/path?arg=value#anchor');
  //        returns 1: {scheme: 'http', host: 'hostname', user: 'username', pass: 'password', path: '/path', query: 'arg=value', fragment: 'anchor'}

  var query, key = ['source', 'scheme', 'authority', 'userInfo', 'user', 'pass', 'host', 'port',
      'relative', 'path', 'directory', 'file', 'query', 'fragment'
    ],
    ini = (this.php_js && this.php_js.ini) || {},
    mode = (ini['phpjs.parse_url.mode'] &&
      ini['phpjs.parse_url.mode'].local_value) || 'php',
    parser = {
      php: /^(?:([^:\/?#]+):)?(?:\/\/()(?:(?:()(?:([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?()(?:(()(?:(?:[^?#\/]*\/)*)()(?:[^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
      strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
      loose: /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/\/?)?((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/ // Added one optional slash to post-scheme to catch file:/// (should restrict this)
    };

  var m = parser[mode].exec(str),
    uri = {},
    i = 14;
  while (i--) {
    if (m[i]) {
      uri[key[i]] = m[i];
    }
  }

  if (component) {
    return uri[component.replace('PHP_URL_', '')
      .toLowerCase()];
  }
  if (mode !== 'php') {
    var name = (ini['phpjs.parse_url.queryKey'] &&
      ini['phpjs.parse_url.queryKey'].local_value) || 'queryKey';
    parser = /(?:^|&)([^&=]*)=?([^&]*)/g;
    uri[name] = {};
    query = uri[key[12]] || '';
    query.replace(parser, function($0, $1, $2) {
      if ($1) {
        uri[name][$1] = $2;
      }
    });
  }
  delete uri.source;
  return uri;
}

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are the closest match to this hashtable-like data structure.

Please also note that php.js offers community built functions and goes by the McDonald’s Theory. We’ll put online functions that are far from perfect, in the hopes to spark better contributions. Do you have one? Then please just:

Other PHP functions in the url extension

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