How to add live search functionality to your website?

January 12, 2018 ashwani Kumar Php 0

With Php Custom Search, full-featured text search engine library written entirely in Php,javascript and xml. It is a technology suitable for nearly any application that requires full-text search.

step-1 First you create index.html page and adding some javascript code for using functionality livesearch.php page

<html>
<head>
<script>
function showResult(str) {
  if (str.length==0) { 
    document.getElementById("livesearch").innerHTML="";
    document.getElementById("livesearch").style.border="0px";
    return;
  }
  if (window.XMLHttpRequest) {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
  } else {  // code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
  xmlhttp.onreadystatechange=function() {
    if (this.readyState==4 && this.status==200) {
      document.getElementById("livesearch").innerHTML=this.responseText;
      document.getElementById("livesearch").style.border="1px solid #A5ACB2";
    }
  }
  xmlhttp.open("GET","livesearch.php?q="+str,true);
  xmlhttp.send();
}
</script>
</head>
<body>

<form>
<input type="text" size="30" onkeyup="showResult(this.value)">
<div id="livesearch"></div>
</form>

</body>
</html>

step-2 Then you create livesearch.php page 

<?php
$xmlDoc = new DOMDocument();
$xmlDoc->load("links.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 = "No results found";
}
else
{
	$response = $hint;
}
echo $response;
?>

step-3 Then you create links.xml file links.xml is used for linking with search data.

<pages>
<link>
<title>HTML br tag</title>
<url>https://www.w3schools.com/tags/tag_br.asp</url>
</link>
<link>
<title>CSS background Property</title>
<url>
https://www.w3schools.com/cssref/css3_pr_background.asp
</url>
</link>
<link>
<title>CSS border Property</title>
<url>https://www.w3schools.com/cssref/pr_border.asp</url>
</link>
<link>
<title>JavaScript Date Object</title>
<url>https://www.w3schools.com/jsref/jsref_obj_date.asp</url>
</link>
<link>
<title>JavaScript Array Object</title>
<url>
https://www.w3schools.com/jsref/jsref_obj_array.asp
</url>
</link>
</pages>