jQuery Tutorial: Submit a Form and Post Data Using jQuery and AJAX

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In this jQuery tutorial, you’ll learn how to submit a form, post the data and format the response using jQuery and AJAX:

https://www.youtube.com/watch?v=-nkud6TwXBI

Here’s the code I used in the video:

Index.php

<!DOCTYPE html>
<html>
  <head>
    <title>Get Data From a MySQL Database Using jQuery and PHP</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <script>
      $(document).ready(function(){
        // Set form variable
        var form = $('#search_form');
        
        // Hijack form submit
        form.submit(function(event){
          // Set username variable
          var username = $('#username').val(); 
          
          // Check if username value set
          if ( $.trim(username) != '' ) {
            // Process AJAX request
            $.post('process.php', {name: username}, function(data){
              // Append data into #results div
              $('#results').html(data);
            });
          }
          
          // Prevent default form action
          event.preventDefault();
        });
      });
    </script>
  </head>
  <body>
    <span>Search by name: </span>
    <form method="POST" action="process.php" id="search_form">
      <input type="text" id="username" name="name">
      <input type="submit" id="submit" value="Search">
    </form>
    <div id="results"></div>
  </body>
</html>

Process.php

<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');

// Check if $_POST is set
if ( empty ( $_POST['name'] ) ) {
  echo "Yo! Something ain't legit!";
  
  exit;
}
// Connec to MySQL
$mysqli = new mysqli('localhost', 'YOUR_USERNAME', 'YOUR_PASSWORD', 'YOUR_DATABASE');

// Check connection
if ( mysqli_connect_errno() ) {
  echo "Can't connect: " . mysqli_connect_error();
}

$stmt = $mysqli->prepare("SELECT * FROM ajaxget WHERE name = ?");
$stmt->bind_param("s", $_POST['name']);
$stmt->execute();

$result = $stmt->get_result();

while( $row = $result->fetch_object() ) {
  $rows[] = $row;
}
?>
<ul>
  <?php foreach ( $rows as $row ) : ?>
  <li><?php echo $row->name; ?>: <?php echo $row->favorite_food; ?></li>
  <?php endforeach; ?>
</ul>

If you enjoyed this tutorial and want to keep learning, check out my free tutorial site here: https://johnsfreetuts.com

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John Morris

JOHN MORRIS

I’m a 15-year veteran of freelance web development. I’ve worked with bestselling authors and average Joe’s next door. These days, I focus on helping other freelancers build their freelance business and their lifestyles.

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