在自动建议搜索框中获取记录

I want to get all the records in autocomplete search box. And as well get complete record from database of selected keyword from autocomplete list.

Output here

http://appail.xyz/ajax-box-php-master/

How can i get complete record by selecting the keyword??

Thank in Advance...

Here is added my PHP, HTML Code.

PHP Code

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
    <script src="typeahead.min.js"></script>
    <script>
    $(document).ready(function(){
    $('input.typeahead').typeahead({
        name: 'typeahead',
        remote:'search.php?key=%QUERY',
        limit : 10
    });
});
    </script>

.bs-example{
    font-family: sans-serif;
    position: relative;
    margin: 50px;
}
.typeahead, .tt-query, .tt-hint {
    border: 2px solid #CCCCCC;
    border-radius: 8px;
    font-size: 24px;
    height: 30px;
    line-height: 30px;
    outline: medium none;
    padding: 8px 12px;
    width: 396px;
}
.typeahead {
    background-color: #FFFFFF;
}
.typeahead:focus {
    border: 2px solid #0097CF;
}
.tt-query {
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.075) inset;
}
.tt-hint {
    color: #999999;
}
.tt-dropdown-menu {
    background-color: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
    margin-top: 12px;
    padding: 8px 0;
    width: 422px;
}
.tt-suggestion {
    font-size: 24px;
    line-height: 24px;
    padding: 3px 20px;
}
.tt-suggestion.tt-is-under-cursor {
    background-color: #0097CF;
    color: #FFFFFF;
}
.tt-suggestion p {
    margin: 0;
}

<div class="panel panel-default">
    <div class="bs-example">
        <input type="text" name="typeahead" class="typeahead tt-query" autocomplete="off" spellcheck="false" placeholder="Type your Query">
    </div>
  </div>

<?php
$key=$_GET['key'];
$array = array();
$con=mysqli_connect("localhost","appail_register","appail_register","appail_register");
$query=mysqli_query($con, "select * from login where username LIKE '%{$key}%'");
while($row=mysqli_fetch_assoc($query)){
$array[] = $row['username'];}
echo json_encode($array);
mysqli_close($con);
?>

</div>