How to Effectively Sanitize User Input in PHP Mailing to Prevent Injections?

Safeguarding User Input in PHP Mailing via Sanitization

Prior to mailing user-submitted data, it's crucial to sanitize the input to prevent malicious injections.

Consider the following PHP mailer script:

<code class="php">$name = $_POST['name'];
$message = $_POST['message'];
$email = $_POST['email'];</code>

The script is susceptible to user input vulnerabilities as it directly accepts values from the form submitted via POST. To rectify this, we must sanitize the input using filter_var().

<code class="php">echo filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);   </code>

This sanitization removes any potentially harmful special characters or code that could compromise the application. For instance, a malicious user could attempt to inject a script into the input, which would execute when the email is opened. Sanitization prevents such scenarios, ensuring the integrity of the data.

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