How to Async Fibonacci Sequence in PHP - Code Snippet

// Task: Async Fibonacci Sequence
// Language: PHP

function async_fibonacci_sequence() {
    // Implementation for Async Fibonacci Sequence
    $ result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Fibonacci Sequence
    echo("Done");
}