读取目录中的所有文件并处理文件字符串的最佳实践

In Java there is the File object that I can use to refer to a file's parent, list children files, and other useful functions (methods). These methods can return File objects, so I don't need to deal with a file's string. Instead, I can just manage the object. This makes things nice and neat and less prone to my typos.

In PHP I am concatenating the directory string with the file name string to get the file string. It works fine, but this seems gimmicky to me, and I would like to know if there is a better way. Is there a PHP equivalent to the built in Java File object?

Here is my code for reading all files in a directory and printing out their contents line by line:

$reportDir = realpath(RESOURCE_PATH . "/userFiles/uploadedReports");
if ($dirHandle = opendir($reportDir)) {
    while (false !== ($entry = readdir($dirHandle))) {
        if ($entry != "." && $entry != ".."){
            $fileString = $reportDir . "/" . $entry;
            $fileHandle = fopen($fileString, "r");
            while (!feof($fileHandle) ) {
               $line = fgets($fileHandle);
               echo $line . "<br />";
            }
            fclose($fileHandle);
            $i++;
        }
    }
    closedir($dirHandle);
}

In case you want to know exactly what I am trying to accomplish with this code, I am going to display to the user an HTML table with data from a tab delimited file.