How can HTML functions be disabled in PHP guestbook entries to prevent table closure tags from being entered?

To prevent users from entering HTML functions in PHP guestbook entries, you can use the `strip_tags()` function to remove any HTML tags before displaying the input. This will prevent users from entering potentially harmful code, such as table closure tags, in the guestbook entries. 

// Get guestbook entry from form submission
$guestbook_entry = $_POST['guestbook_entry'];

// Remove any HTML tags from the guestbook entry
$clean_entry = strip_tags($guestbook_entry);

// Display the sanitized guestbook entry
echo $clean_entry;

Keywords

PHP HTML functions guestbook table closure tags security

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