点击发布按钮评论无法提交至数据库问题求助（附community.php代码）

Hey James, nice job ruling out typos already—that’s a solid first step. Let’s break down the most likely culprits for your form doing nothing when you click "publish":

1. You’re Missing a Submit Button (The #1 Oversight!) #

Looking at your code snippet, there’s no <button type="submit"> or <input type="submit"> inside your form. Without this, clicking your "publish" element (whatever it is right now) won’t actually trigger the form to send data. Add this inside your <form> tag:

<button type="submit" name="submit_comment">Publish Comment</button>

2. Verify Form Submission & Data Handling #

Your form uses action="", which means it submits to the same page (community.php). Let’s confirm the data is actually reaching your processing script:

• Add a debug line at the top of check_com.php to see if POST data comes through:

  var_dump($_POST); // This will print all submitted data
  exit;
  

  If this doesn’t show your comment field, there’s a problem with how the form is sending data.
• Make sure you’re checking for the submit button before processing in check_com.php:

  if (isset($_POST['submit_comment'])) {
      // Your database insertion logic goes here
  }
  

3. Check for JavaScript Blocking Submission #

If you have frontend JS attached to the form or "publish" element, it might be stopping the default submission. Look for code like this:

document.querySelector('.main').addEventListener('submit', function(e) {
    e.preventDefault(); // This stops the form from submitting normally
    // If you’re using AJAX here, double-check the request is reaching the server
});

If you’re using AJAX, confirm your request URL is correct and you’re handling the server response properly.

4. Fix Silent Database Errors #

Even if the form submits, your database insertion might fail without telling you. Add error handling to your database code:

• Confirm your connection works:

  $conn = mysqli_connect($host, $user, $pass, $db);
  if (!$conn) {
      die("Connection failed: " . mysqli_connect_error());
  }
  

• Check for query errors after insertion:

  $sql = "INSERT INTO comments (comment_text) VALUES (?)";
  $stmt = mysqli_prepare($conn, $sql);
  mysqli_stmt_bind_param($stmt, "s", $_POST['comment']);
  if (!mysqli_stmt_execute($stmt)) {
      echo "Error saving comment: " . mysqli_error($conn);
  }
  

• Enable PHP error reporting temporarily to catch hidden issues:

  error_reporting(E_ALL);
  ini_set('display_errors', 1);
  

5. Double-Check Your Textarea Closure #

Your snippet cuts off at <textarea class="form-text" name="comment" id="comment"></...—make sure the textarea is properly closed with </textarea>. An unclosed element can break form rendering and submission.

Start with the submit button check first—it’s the most common fix for a form that does nothing on click. Let me know what you find!

内容的提问来源于stack exchange，提问作者James Smith