Question

Açtım o süresi dolmuş bir mesaj görüntülemek gerekiyorsa şimdi beş ziyaretler sonra ... ben linki gerek, dosya yükleme sistemini kullanarak bir bağlantı oluşturmak mümkün duyuyorum.

<?php
function display_upload_form()
{
echo <<<DISPLAY_UPLOAD_FORM

    <html>
    <head>
    <title>Yet Another Upload Form</title>
    <style type="text/css" media="screen">
        <!--
        html body
        {background:#fff; font: 76%/1.5em arial, helvetica, sans-serif; color:#333;}

        input
        {color:#333;}
        -->
    </style>
    </head>

    <body>

    <form method="post" action="{$_SERVER['PHP_SELF']}" enctype="multipart/form-data">

    <p>Select a file.<br />
    <input type="file" name="myfile" tabindex="1" /></p>

    <p><input type="hidden" name="execute" value="1" /></p>

    <p><input type="submit" value="Upload File" tabindex="2" />

    </form>

    </body>
    </html>

DISPLAY_UPLOAD_FORM;
}


function execute_upload()
{
    // root path
    $path = $_SERVER['DOCUMENT_ROOT'];

    // upload directory. path will originate from root.
    $dirname = '/uploads';

    // permission settings for newly created folders
    $chmod = 0755;

    // create file vars to make things easier to read.
    $filename = $_FILES['myfile']['name'];
    $filesize = $_FILES['myfile']['size'];
    $filetype = $_FILES['myfile']['type'];
    $file_tmp = $_FILES['myfile']['tmp_name'];
    $file_err = $_FILES['myfile']['error'];
    $file_ext = strrchr($filename, '.');

    // check if user actually put something in the file input field.
    if (($file_err == 0) && ($filesize != 0))
    {
        // Check extension.
        if (!$file_ext)
        {
            unlink($file_tmp);
            die('File must have an extension.');
        }

        // extra check to prevent file attacks.
        if (is_uploaded_file($file_tmp))
        {
            /*
            * check if the directory exists
            * if it doesnt exist, make the directory
            */
            $dir = $path . $dirname;

            if (!is_dir($dir))
            {
                $dir = explode('/', $dirname);

                foreach ($dir as $sub_dir)
                {
                    $path .= '/' . $sub_dir;
                    if (!is_dir($path))
                    {
                        if (!mkdir($path, $chmod))
                        {
                            unlink($file_tmp);
                            die('<strong>Error:</strong> Directory does not exist and was unable to be created.');
                        }
                    }
                }
            }

            /*
            * copy the file from the temporary upload directory
            * to its final detination.
            */
            if (@move_uploaded_file($file_tmp, $dir . '/' . $filename))
            {
                // success!
                echo "
                <p>Success!</p>
                <p><strong>View File:</strong> <a href=\"$dirname/$filename\">$filename</a></p>
                ";
            }
            else
            {
                // error moving file. check file permissions.
                unlink($file_tmp);
                echo '<strong>Error:</strong> Unable to move file to designated directory.';
            }
        }
        else
        {
            // file seems suspicious... delete file and error out.
            unlink($file_tmp);
            echo '<strong>Error:</strong> File does not appear to be a valid upload. Could be a file attack.';
        }
    }
    else
    {
        // Kill temp file, if any, and display error.
        if ($file_tmp != '')
        {
            unlink($file_tmp);
        }

        switch ($file_err)
        {
            case '0':
                echo 'That is not a valid file. 0 byte length.';
                break;

            case '1':
                echo 'This file, at ' . $filesize . ' bytes, exceeds the maximum allowed file size as set in <em>php.ini</em>. '.
                'Please contact your system admin.';
                break;

            case '2':
                echo 'This file exceeds the maximum file size specified in your HTML form.';
                break;

            case '3':
                echo 'File was only partially uploaded. This could be the result of your connection '.
                'being dropped in the middle of the upload.';

            case '4':
                echo 'You did not upload anything... Please go back and select a file to upload.';
                break;
        }
    }
}

// Logic Code *****************************************************************

if (isset($_POST['execute']))
{
    execute_upload();
}
else
{
    display_upload_form();
}


?>

Ben aldım aşağıdaki kodu kullanıyorum.

Answer 1

Muhtemelen sayaç yere saklamak zorunda gidiyoruz. Bir metin dosyası, veya tercihen bir veritabanı. Sen geçerli saymak için dosya için bir alan, ve bir alanı olan bir tek tablo veritabanından ağır yararlanacak.

Dosya istenen zaman, veritabanından sayısını kontrol edin. O = 5 ise, bir hata dönmek ve dosyayı kaldırın.

bağlantı beş ziyaretleri sonra sona ermiş olmalıdır

1 Cevap

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