How to Async Verify Signature in PHP - Code Snippet

// Task: Async Verify Signature
// Language: PHP

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