I have small project of PHP and JavaScript, which used to registering students on the MySql database and it does perfectly, but I need when user search/type certain name on it, example if he/she type name like "John" it has to show drop down of names which are relate with letter "J", I tried but it doesn't work. I will show you step by step What I did.
1: This is html form which user use to enter students Marks, on field name is where I want when user type name on text box, it has to show related names:
Note: I will show you few fields.
<form action="#" method="POST" id="name" name="name"   
enctype="multipart/form-
data">
 <div class="row">
<div class="col-sm-6">
    <div class="panel panel-default">
    <div class="panel-body">
    <div class="form_sep">
        <label for="reg_input_name" class="req">Admition Number</label>
         <input type="text" id="idnum" name="idnum" class="form-control"    
            data-required="true" >
        </div>
        <div class="form_sep">
       <label for="reg_textarea_message" class="req">Name</label>
        <input type="text"  name="name" id="name" cols="30" rows="4"  
           class="form-control"></div>
       </div>
        </div>
         </div></div></form>
2:This is JavaScript codes and jQuery plugin which I place down on the same html form.
<script src="../jquery-ui.js"></script>
<script type="text/javascript">
    $(document).ready(function(){
        $.get('getStudents.php', function(data){
            var students = JSON.parse(data);
            $('#name').autocomplete({
                source: students
            });
        });
    });
</script>
3: This is PHP (getStudents.php) file.
<?php
include_once "db_connect.php";
 $sql = "SELECT * FROM student_reg";
  $res = mysql_query($sql);
   if($res){
  $students = array();
   while($r = mysql_fetch_array($res)){
    $students[] = $r['sname'];
    }
  echo json_encode($students);
    }else{
  echo mysql_error();
    }
 ?>
Note: when I test/ echo on the php file its self it show all names, but when I place cursor on "name" text field and type it doesn't show drop down suggested names as I prefer.
 
     
    