What are some best practices for ensuring that HTML content in PHP emails renders correctly in email clients?

When sending HTML content in PHP emails, it's important to ensure that the HTML renders correctly in various email clients. To do this, use inline CSS styles, avoid complex layouts, test the email in different clients, and include a plain text version as a fallback. 

// Example PHP code snippet for sending HTML email with inline CSS styles

$to = "recipient@example.com";
$subject = "HTML Email Test";
$message = "
<html>
<head>
<style>
  body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
  }
</style>
</head>
<body>
<h1>This is a test HTML email</h1>
<p>Here is some content with inline CSS styles.</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

PHP HTML content email clients rendering best practices

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