php统计目录和子目录中文件中的字符串总数

<?php
function countStringsInDirectory($directory, $searchString) {
    $total = 0;
    $files = scandir($directory);
    
    foreach ($files as $file) {
        if ($file == '.' || $file == '..') {
            continue;
        }
        
        $path = $directory . '/' . $file;
        
        if (is_dir($path)) {
            $total += countStringsInDirectory($path, $searchString);
        } else {
            $content = file_get_contents($path);
            $count = substr_count($content, $searchString);
            $total += $count;
        }
    }
    
    return $total;
}

$directory = '/path/to/directory';
$searchString = 'your_search_string';
$totalCount = countStringsInDirectory($directory, $searchString);

echo "Total count of '{$searchString}' in directory '{$directory}': {$totalCount}";
?>