How to Async Get File Extension in PHP - Code Snippet

// Task: Async Get File Extension
// Language: PHP

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