How to perform 'Async Base64 Encode' in PHP.
// Task: Async Base64 Encode
// Language: PHP
function async_base64_encode() {
// Implementation for Async Base64 Encode
$ result = ...; // Initialize variable
// TODO: Implement core logic here
// Step 1: Prepare data
// Step 2: Process Async Base64 Encode
echo("Done");
}