What are common issues with HTML email formatting in PHP?

Common issues with HTML email formatting in PHP include incorrect encoding of special characters, missing headers such as Content-Type and MIME-Version, and improper use of CSS styles. To solve these issues, make sure to properly encode special characters using functions like htmlspecialchars, include necessary headers in the email, and use inline CSS styles instead of external stylesheets. 

// Example PHP code snippet to send an HTML email with correct formatting

$to = "recipient@example.com";
$subject = "HTML Email Test";

$message = "<html>
<head>
<style>
  body { font-family: Arial, sans-serif; }
</style>
</head>
<body>
<h1>Hello, this is a test HTML email!</h1>
<p>This is a sample paragraph with <strong>bold text</strong>.</p>
</body>
</html>";

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

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

Keywords

HTML email formatting PHP CSS email clients

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