关于基本的文件读写内容：

     ";    readfile("tm.txt");    echo "
";    echo "file function:
";    $f_arr = file("tm.txt");    foreach ($f_arr as $cont) {        echo $cont."
";    }    echo "file_get_contents function:
";    $f_chr = file_get_contents('tm.txt');    echo $f_chr;        ?>