What are the common pitfalls or challenges faced by beginners when trying to format email content in PHP?

One common challenge faced by beginners when formatting email content in PHP is correctly setting the headers, such as the Content-Type and charset, to ensure the email displays correctly in various email clients. To solve this, make sure to set the headers properly using the `header()` function before sending the email.

// Set the headers for the email content
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";

// Additional headers
$headers .= 'From: Your Name <youremail@example.com>' . "\r\n";

// Send the email
mail($to, $subject, $message, $headers);