How can PHP developers ensure that variables are properly interpreted in email messages to avoid displaying them as plain text?

To ensure that variables are properly interpreted in email messages and not displayed as plain text, PHP developers can use double quotes instead of single quotes when defining the email message content. This allows variables to be parsed and replaced with their actual values. Additionally, concatenating variables within the double quotes can help ensure that the entire message is interpreted correctly. 

$email = "example@example.com";
$name = "John Doe";
$message = "Hello, $name. Thank you for subscribing to our newsletter.";

// Send email
mail($email, "Welcome to our newsletter", $message);

Keywords

PHP email messages variables interpretation plain text

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