In the provided PHP code snippet, what improvements can be made to enhance readability, maintainability, and performance when extracting RAR files?

The provided PHP code snippet for extracting RAR files lacks error handling, proper variable naming, and separation of concerns. To enhance readability, maintainability, and performance, we can refactor the code by adding error handling, using meaningful variable names, and separating the extraction logic into a separate function.

<?php

function extractRarFile($rarFile, $destinationFolder) {
    $rar = new RarArchive;
    $archive = $rar->open($rarFile);
    
    if ($archive === false) {
        throw new Exception("Failed to open RAR archive");
    }

    foreach ($archive->getEntries() as $entry) {
        $entry->extract($destinationFolder);
    }

    $rar->close();
}

// Usage
$rarFile = "example.rar";
$destinationFolder = "extracted_files/";

try {
    extractRarFile($rarFile, $destinationFolder);
    echo "RAR file extracted successfully.";
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}