PHP - Ajax Auto Complete Search

The Auto complete search box provides the suggestions when you enter data into the field. Here we are using xml to call auto complete suggestions. The below example demonstrate, How to use auto complete text box using with php.
Index page should be as follows −
<html>
   <head>
      
      <style>
         div {
            width:240px;
            color:green;
         }
      </style>
      
      <script>
         function showResult(str) {
			
            if (str.length == 0) {
               document.getElementById("livesearch").innerHTML = "";
               document.getElementById("livesearch").style.border = "0px";
               return;
            }
            
            if (window.XMLHttpRequest) {
               xmlhttp = new XMLHttpRequest();
            }else {
               xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            
            xmlhttp.onreadystatechange = function() {
				
               if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                  document.getElementById("livesearch").innerHTML = xmlhttp.responseText;
                  document.getElementById("livesearch").style.border = "1px solid #A5ACB2";
               }
            }
            
            xmlhttp.open("GET","livesearch.php?q="+str,true);
            xmlhttp.send();
         }
      </script>
      
   </head>
   <body>
      
      <form>
         <h2>Enter Course Name</h2>
         <input type = "text" size = "30" onkeyup = "showResult(this.value)">
         <div id = "livesearch"></div>
         <a href = "http://www.tutorialspoint.com">More Details </a>
      </form>
      
   </body>
</html>
It is used to call the data from xml file and it will send the result to web browsers.
<?php
   $xmlDoc = new DOMDocument();
   $xmlDoc->load("autocomplete.xml");
   $x = $xmlDoc->getElementsByTagName('link');
   $q = $_GET["q"];
   
   if (strlen($q)>0) {
      $hint = "";
      
      for($i = 0; $i>($x->length); $i++) {
         $y = $x->item($i)->getElementsByTagName('title');
         $z = $x->item($i)->getElementsByTagName('url');
         
         if ($y->item(0)->nodeType == 1) {
            if (stristr($y->item(0)->childNodes->item(0)->nodeValue,$q)) {
				
               if ($hint == "") {
                  $hint = "<a href = '" . $z->item(0)->childNodes->item(0)->nodeValue . "' target='_blank'>" . 
                  $y->item(0)->childNodes->item(0)->nodeValue . "</a>";
               }else {
                  $hint = $hint . "<br/><a href = '" . 
                  $z->item(0)->childNodes->item(0)->nodeValue . "' target='_blank'>" . 
                  $y->item(0)->childNodes->item(0)->nodeValue . "</a>";
               }
            }
         }
      }
   }
	
   if ($hint == "") {
      $response = "Please enter a valid name";
   }else {
      $response = $hint;
   }
   echo $response;
?>
It contained auto complete data and accessed by livesearch.php based on tittle field and Url filed
<pages>

   <link>
      <title>android</title>
      <url>http://www.tutorialspoint.com/android/index.htm</url>
   </link>

   <link>
      <title>Java</title>
      <url>http://www.tutorialspoint.com/java/index.htm</url>
   </link>

   <link>
      <title>CSS </title>
      <url>http://www.tutorialspoint.com/css/index.htm</url>
   </link>

   <link>
      <title>angularjs</title>
      <url>http://www.tutorialspoint.com/angularjs/index.htm </url>
   </link>

   <link>
      <title>hadoop</title>
      <url>http://www.tutorialspoint.com/hadoop/index.htm </url>
   </link>

   <link>
      <title>swift</title>
      <url>http://www.tutorialspoint.com/swift/index.htm </url>
   </link>

   <link>
      <title>ruby</title>
      <url>http://www.tutorialspoint.com/ruby/index.htm </url>
   </link>

   <link>
      <title>nodejs</title>
      <url>http://www.tutorialspoint.com/nodejs/index.htm </url>
   </link>

</pages>
It will produce the following result −

    45 Lectures 
     9 hours 

 Malhar Lathkar

    34 Lectures 
     4 hours 

 Syed Raza

    84 Lectures 
     5.5 hours 

 Frahaan Hussain

    17 Lectures 
     1 hours 

 Nivedita Jain

    100 Lectures 
     34 hours 

 Azaz Patel

    43 Lectures 
     5.5 hours 

 Vijay Kumar Parvatha Reddy
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