Please correct the code

I have a problem with entering text value via java in sql

 <input type="text" name="test" id="test" >
<script>
    setInterval(function() {
        var test = Number($('#test').val());
        var test = <?php   $sql = $db_con->prepare("SELECT * FROM table1 where id = 'Number($('#test').val())'  ");?>;   
    }, 500);
    </script>