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  • Adding Bookmarks the AJAX Way

    November 22, 2013

    Please find following code for adding bookmarks the ajax way here.
    Here are the scripts:

    THE AJAX.JS FILE

    View Code PHP
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    function getXMLHTTPRequest() {
   var req =  false;
   try {
      /* for Firefox */
      req = new XMLHttpRequest();
   } catch (err) {
      try {
         /* for some versions of IE */
         req = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (err) {
         try {
            /* for some other versions of IE */
            req = new ActiveXObject("Microsoft.XMLHTTP");
         } catch (err) {
            req = false;
         }
     }
   }
 
   return req;
}
 
function addNewBookmark() {
  var url = "add_bms.php";
  var params = "new_url=" + encodeURI(document.getElementById('new_url').value);
  myReq.open("POST", url, true);
  myReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  myReq.setRequestHeader("Content-length", params.length);
  myReq.setRequestHeader("Connection", "close");
  myReq.onreadystatechange = addBMResponse;
  myReq.send(params);
}
 
function addBMResponse() {
  if (myReq.readyState == 4) {
    if(myReq.status == 200) {
       result = myReq.responseText;
       document.getElementById('displayresult').innerHTML = result;
    } else {
      alert('There was a problem with the request.');
    }
  }
}

    THE ADD BOOKMARKS FUNCTION FROM THE OUTPUT LIBRARY

    View Code PHP
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    function display_add_bm_form() {
  // display the form for people to enter a new bookmark in
?&gt;<script type="text/javascript">// <![CDATA[
var myReq = getXMLHTTPRequest();
// ]]></script>
    New BM:

    THE ADD_BM FUNCTION FROM THE URL FUNCTION LIBRARY

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    function add_bm($new_url) {
  // Add new bookmark to the database
 
  echo "Attempting to add ".htmlspecialchars($new_url)."
";
  $valid_user = $_SESSION['valid_user'];
 
  $conn = db_connect();
 
  // check not a repeat bookmark
  $result = $conn-&gt;query("select * from bookmark
                         where username='$valid_user'
                         and bm_URL='".$new_url."'");
 
  if ($result &amp;&amp; ($result-&gt;num_rows&gt;0)) {
    echo "

    Bookmark already exists.

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    ";
  } else {
    //attempt to add
    if (!$conn-&gt;query("insert into bookmark values
       ('".$valid_user."', '".$new_url."')")) {
       echo "

    Bookmark could not be inserted.

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    ";
    } else {
       echo "

    Bookmark added.

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    ";
    }
  }
 
  return true;
}

    THE DB_CONNECT FUNCTION FROM THE DB FUNCTION LIBRARY

    View Code PHP
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    function db_connect() {
   $result = new mysqli('localhost', 'bm_user', 'password', 'bookmarks');
   if (!$result) {
     throw new Exception('Could not connect to database server');
   } else {
     return $result;
   }
}
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