What are the key considerations for ensuring HTML content is correctly interpreted in email bodies when using PHP?

When sending HTML content in email bodies using PHP, it is important to set the appropriate headers and content type to ensure that the HTML is correctly interpreted by email clients. This can be achieved by setting the "Content-Type" header to "text/html" in the mail function. 

$to = 'recipient@example.com';
$subject = 'Subject of the email';
$message = '<html><body><h1>Hello, this is HTML content</h1></body></html>';
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

mail($to, $subject, $message, $headers);

Keywords

PHP HTML content email bodies MIME type Content-Type

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