What are some best practices for separating email processing and output in PHP?

When processing emails in PHP, it's best practice to separate the processing logic from the output generation. This helps in maintaining a clean and organized codebase, making it easier to debug and maintain in the long run. One way to achieve this separation is by using functions or classes to handle the email processing logic separately from the code responsible for generating the output.

// Email processing logic
function processEmail($email) {
    // Process the email here
    return $processedEmailData;
}

// Output generation
function generateOutput($processedEmailData) {
    // Generate the output using the processed email data
    echo "Output: " . $processedEmailData;
}

// Example of how to use the functions
$email = "example@example.com";
$processedEmailData = processEmail($email);
generateOutput($processedEmailData);