How to Async Get Audio Duration in PHP - Code Snippet

// Task: Async Get Audio Duration
// Language: PHP

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