<!DOCTYPE html>
<html>
<body>

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland", 23);

if (in_array("23", $people, TRUE))
 {
 echo "Match found ";
 }
else
 {
 echo "Match not found ";
 }
if (in_array("Glenn",$people, TRUE))
 {
 echo "Match found ";
 }
else
 {
 echo "Match not found ";
 }

if (in_array(23,$people, TRUE))
 {
 echo "Match found ";
 }
else
 {
 echo "Match not found ";
 }
?>

</body>
</html>