What are the potential risks of using <htmllink>?message_id=123 for displaying messages in PHP?

Using <htmllink>?message_id=123 for displaying messages in PHP can pose a security risk as it exposes the message ID directly in the URL, making it vulnerable to manipulation by users. To mitigate this risk, it is recommended to use server-side validation and sanitization of the message ID before displaying the message content. 

&lt;?php
// Sanitize the message ID parameter
$message_id = filter_input(INPUT_GET, &#039;message_id&#039;, FILTER_SANITIZE_NUMBER_INT);

// Retrieve the message content from the database using the sanitized message ID
// Example query: $message_content = $db-&gt;query(&quot;SELECT content FROM messages WHERE id = $message_id&quot;);

// Display the message content
echo $message_content;
?&gt;

Keywords

XSS security vulnerability input validation URL parameters message display

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