test.php

<!DOCTYPE html>
<html>
<head>
<style>
* {
  box-sizing: border-box;
}

#myInput {
  background-image: url('/css/searchicon.png');
  background-position: 10px 12px;
  background-repeat: no-repeat;
  width: 100%;
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
}

#myUL {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

#myUL li a {
  border: 1px solid #ddd;
  margin-top: -1px; /* Prevent double borders */
  background-color: #f6f6f6;
  padding: 12px;
  text-decoration: none;
  font-size: 18px;
  color: black;
  display: block
}

#myUL li a:hover:not(.header) {
  background-color: #eee;
}

</style>

<script>

function myFunction() {
 
    var input, filter, ul, li, a, i;
    input = document.getElementById("myInput");
    filter = input.value.toUpperCase();
    ul = document.getElementById("myUL");
    li = ul.getElementsByTagName("li");
    for (i = 0; i < li.length; i++) {
        a = li[i].getElementsByTagName("a")[0];
        if (a.innerHTML.toUpperCase().indexOf(filter) > -1) {
            li[i].style.display = "";
        } else {
            li[i].style.display = "none";

        }
    }
}
</script>
</head>
<body>

<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<ul id="myUL">
<?php
    $key=$_GET['key'];
    $array = array();
    $con=mysqli_connect('sql308.byethost11.com','b11_18001806','eshu@123','b11_18001806_dbms');
    if (mysqli_connect_errno($con)) 
    {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
    

    $query=mysqli_query($con,"select * from company ");
 while($row=mysqli_fetch_assoc($query))
    {
         $s="form.php?code=".$row['code'];
           ?>
<li><a href="<?php echo $s ?>"><?php echo $row['name'] ?></a></li>
    <?php
	}
	
?>
</ul>

</body>
</html>
	