The function presented in this page ( urlData() ) can be used to get /extract the domain name and other data from URL address.
The function receives a string with the URL address, and returns an object containing these data:
Protocol, Page Path, File-name, search parts, port, and hash part.

Code of the function (click to select it):
// Extract data from URL address
// Returns an object with parts of the URL address:
// protocol, domain-name, port, path, file-name, search-string, search-object, hash
function urlData(url){ // From: https://coursesweb.net/javascript/
  // object that will be returned
  var re = {protocol:'', domain:'', port:80, path:'', file:'', search_str:'', search_obj:{}, hash:''};

  // creates an anchor element, and adds the url in "href" attribute
  var a_elm  = document.createElement('a');
  a_elm.href = url;

  // adds URL data in re object, and returns it
  re.protocol = a_elm.protocol.replace(':', '');
  re.domain = a_elm.hostname.replace('www.', '');
  if(a_elm.port !='') re.port = a_elm.port;
  re.path = a_elm.pathname;
  if(a_elm.pathname.match(/[^\/]+[\.][a-z0-9]+$/i) != null) re.file = a_elm.pathname.match(/[^\/]+[\.][a-z0-9]+$/i)[0];
  re.search_str = a_elm.search.replace('?', '');

  //get search-data into an object {name:value}, in case there are multiple pairs name=value
  var src_data = re.search_str.split('&');
  for(var i=0; i<src_data.length; i++){
    var ar_val = src_data[i].split('=');   //separate name and value from each pair
    re.search_obj[ar_val[0]] = ar_val[1];
  }

  re.hash = a_elm.hash.replace('#', '');  //get #hash part
  return re;
}
Example:
<div id="urld">Here it is added URL data.</div>
<script>
// Extract data from URL address
// Returns an object with parts of the URL address:
// protocol, domain-name, port, path, file-name, search-string, search-object, hash
function urlData(url){ // From: https://coursesweb.net/javascript/
  // object that will be returned
  var re = {protocol:'', domain:'', port:80, path:'', file:'', search_str:'', search_obj:{}, hash:''};

  // creates an anchor element, and adds the url in "href" attribute
  var a_elm  = document.createElement('a');
  a_elm.href = url;

  // adds URL data in re object, and returns it
  re.protocol = a_elm.protocol.replace(':', '');
  re.domain = a_elm.hostname.replace('www.', '');
  if(a_elm.port !='') re.port = a_elm.port;
  re.path = a_elm.pathname;
  if(a_elm.pathname.match(/[^\/]+[\.][a-z0-9]+$/i) != null) re.file = a_elm.pathname.match(/[^\/]+[\.][a-z0-9]+$/i)[0];
  re.search_str = a_elm.search.replace('?', '');

  //get search-data into an object {name:value}, in case there are multiple pairs name=value
  var src_data = re.search_str.split('&');
  for(var i=0; i<src_data.length; i++){
    var ar_val = src_data[i].split('=');   //separate name and value from each pair
    re.search_obj[ar_val[0]] = ar_val[1];
  }

  re.hash = a_elm.hash.replace('#', '');  //get #hash part
  return re;
}

// Test
var url = 'https://coursesweb.net:80/javascript/index.php?pg=tutorial&id=89#hash_part';
var url_data = urlData(url);

// displays URL data in #urld
document.getElementById('urld').innerHTML = 'protocol : '+ url_data.protocol +'<br>domain : '+ url_data.domain +'<br>port : '+ url_data.port +'<br>path : '+ url_data.path +'<br>file : '+ url_data.file +'<br>search_str : '+ url_data.search_str +'<br>search_obj : '+ JSON.stringify(url_data.search_obj) +'<br>hash : '+ url_data.hash;
</script>
Result:
protocol : http
domain : coursesweb.net
port : 80
path : /javascript/index.php
file : index.php
search_str : pg=tutorial&id=89
search_obj : {"pg":"tutorial", "id":"89"}
hash : hash_part

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Click on the HTML tag which creates an horizontal line in web page.
<br /> <em> <hr />
Some content ...
<hr />
Content under line ...
Which CSS property defines the text color?
font-style font-variant color
h2 {
  color: #cbdafb;
}
Click on the function which searches if a character, or text exists in a string.
indexOf() toString() split()
var str = "Web courses - http://CoursesWeb.net/";
if(str.indexOf("http://") == -1) alert("http:// isn`t in string");
else alert("http:// is in string");
Which function splits a string into an array of strings based on a separator?
array_merge() explode() implode()
$str = "apple,banana,melon,pear";
$arr = explode(",", $str);
var_export($arr);      // array (0=>"apple", 1=>"banana", 2=>"melon", 3=>"pear")
Get Domain Name and other Data from URL

Last accessed pages

  1. SHA256 Encrypt hash in JavaScript (7023)
  2. Input text fields (2285)
  3. Insert, Select and Update NULL value in MySQL (30219)
  4. Register and show online users and visitors (25571)
  5. JavaScript Slideshow Content (855)

Popular pages this month

  1. Insert, Select and Update NULL value in MySQL (515)
  2. Read Excel file data in PHP - PhpExcelReader (430)
  3. PhpSpreadsheet - Read, Write Excel and LibreOffice Calc files (319)
  4. PHP getElementById and getElementsByTagName (255)
  5. Courses Web: PHP-MySQL JavaScript Node.js Ajax HTML CSS (234)