PHP搜索关键字的文件(不区分大小写)？

<?php
function searchFiles($directory, $keyword) {
    $results = array();

    $files = scandir($directory);
    foreach ($files as $file) {
        $filePath = $directory . '/' . $file;
        if (is_file($filePath)) {
            $content = file_get_contents($filePath);
            if (stripos($content, $keyword) !== false) {
                $results[] = $filePath;
            }
        }
    }

    return $results;
}

$directory = '/path/to/directory'; // 替换为你要搜索的目录路径
$keyword = '关键字'; // 替换为你要搜索的关键字

$results = searchFiles($directory, $keyword);
if (empty($results)) {
    echo '未找到匹配的文件。';
} else {
    echo '找到以下匹配的文件：' . PHP_EOL;
    foreach ($results as $result) {
        echo $result . PHP_EOL;
    }
}
?>