What are common issues when sending formatted emails using PHP?

Common issues when sending formatted emails using PHP include incorrect formatting tags, missing headers, and encoding problems. To solve these issues, make sure to properly format the HTML content of the email, include necessary headers such as Content-Type and charset, and encode special characters using functions like htmlentities(). 

// Example PHP code snippet to send a formatted email with correct headers and encoding
$to = "recipient@example.com";
$subject = "Test HTML Email";

$message = "<html><body>";
$message .= "<h1>Hello, this is a test email!</h1>";
$message .= "<p>This is a <strong>formatted</strong> email.</p>";
$message .= "</body></html>";

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

// Encode special characters in the subject
$subject = '=?UTF-8?B?' . base64_encode($subject) . '?=';

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

Keywords

SMTP HTML email PHPMailer MIME formatting bug

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