What best practices should be followed when dynamically replacing content in emails using PHP?

When dynamically replacing content in emails using PHP, it is important to sanitize user input to prevent any malicious code injection. Additionally, make sure to properly format the email content with HTML tags for styling and structure. Finally, test the email template thoroughly to ensure that the dynamic content is being replaced correctly before sending it out. 

// Example code snippet for dynamically replacing content in emails using PHP

// User input (e.g. from a form submission)
$user_name = $_POST['user_name'];
$user_email = $_POST['user_email'];

// Email content with placeholders for dynamic content
$email_content = "<p>Hello, {{user_name}}!</p>
                  <p>Thank you for signing up with us. Your email address is {{user_email}}.</p>";

// Replace placeholders with user input
$email_content = str_replace('{{user_name}}', $user_name, $email_content);
$email_content = str_replace('{{user_email}}', $user_email, $email_content);

// Send the email
$to = 'recipient@example.com';
$subject = 'Welcome to our website!';
$headers = 'From: sender@example.com';
mail($to, $subject, $email_content, $headers);

Keywords

PHP dynamic content email templating security

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