What steps can be taken to ensure cross-client compatibility when sending HTML emails via PHP?

Cross-client compatibility when sending HTML emails via PHP can be ensured by using inline CSS, avoiding complex layouts, testing emails on different email clients, and providing a plain text version as a fallback. This helps ensure that the email will display correctly across various email clients. 

// Example PHP code snippet for sending an HTML email with cross-client compatibility

$to = "recipient@example.com";
$subject = "Test Email";
$message = "
<html>
<head>
<style>
/* Inline CSS styles */
</style>
</head>
<body>
<h1>Hello, world!</h1>
<p>This is a test email.</p>
</body>
</html>
";

// Additional headers
$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 emails cross-client compatibility email headers MIME types

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