public function combineJsFiles($inputFiles, $outputFile)
{
$content = '';
foreach ($inputFiles as $file) {
$content .= "/*** BEGIN FILE: {$file} ***/\n" . file_get_contents($file) . "/*** END FILE: {$file} ***/\n";
}
if (!file_put_contents($outputFile, $content)) {
throw new Exception("Unable to write output JavaScript file '{$outputFile}'.");
}
}