Untitled

<?php
session_start();

if (isset($_POST['limpa'])) {
    limpaLog();
}

function limpaLog() {
    $arquivo = 'log.txt';
    if (file_exists($arquivo)) {
        unlink("log.txt");
        $fp = fopen('log.txt', 'a+');
        fclose($fp);
    } else {
        $fp = fopen('log.txt', 'a+');
        fclose($fp);
    }
}
?>

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <link href="css.css" rel="stylesheet" type="text/css" >
        <script type="text/javascript">
            window.setInterval("atualizar()", 5000);
            function atualizar() {
                location.reload(true);
            }
        </script>
    </head>
    <body>

        <table id="titulo">
            <tr>
                <?php
                echo '<td colspan="6">SAÍDA DE LOG</td>';
                ?>
            </tr>
        </table>

        <table border="1" id="tabela-log">
            <tr>
                <?php
                echo '<th>Data</th><th>Hora</th><th>Setor</th><th>IP do Host</th><th>Taxa</th><th>Porta</th>';
                ?>
            </tr>
            <?php
            $f = file("http://localhost/www/projetoPingBeta/log.txt");
            foreach ($f as $vLog) {
                $imprime = explode(" ", $vLog);
                echo '<tr><td>' . $imprime[0] . '</td>' . '<td>' . $imprime[1] . '</td>' . '<td>' . $imprime[2] . '</td>' . '<td>' . $imprime[3] . '</td>' . '<td>' . $imprime[4] . '</td>' . '<td>' . $imprime[5] . '</td></tr>';
            }
            ?>
        </table>

        <form action="frame-log.php" method="post">
            <input type="submit" value="Limpar Log" name="limpa" >
        </form>

    </body>
</html>