data://

    data:// — Data (RFC 2397)

    Опис

    The data: (» RFC 2397) stream wrapper.

    Використання

    • data://text/plain;base64,

    Опції

    Wrapper Summary
    Attribute Supported
    Restricted by allow_url_fopen Yes
    Restricted by allow_url_include Yes
    Allows Reading Yes
    Allows Writing No
    Allows Appending No
    Allows Simultaneous Reading and Writing No
    Supports stat() No
    Supports unlink() No
    Supports rename() No
    Supports mkdir() No
    Supports rmdir() No

    Приклади

    Приклад #1 Print data:// contents

    <?php
    // prints "I love PHP"
    echo file_get_contents('data://text/plain;base64,SSBsb3ZlIFBIUAo=');
    ?>

    Приклад #2 Fetch the media type

    <?php
    $fp     = fopen('data://text/plain;base64,', 'r');
    $meta = stream_get_meta_data($fp);

    // prints "text/plain"
    echo $meta['mediatype'];
    ?>

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    User Contributed Notes 3 notes

    up
    24
    from dot php dot net at brainbox dot cz
    14 years ago
    When passing plain string without base64 encoding, do not forget to pass the string through URLENCODE(), because PHP automatically urldecodes all entities inside passed string (and therefore all + get lost, all % entities will be converted to the corresponding characters).

    In this case, PHP is strictly compilant with the RFC 2397. Section 3 states that passes data should be either in base64 encoding or urlencoded.

    VALID USAGE:
    <?php
    $fp     = fopen('data:text/plain,'.urlencode($data), 'rb'); // urlencoded data
    $fp = fopen('data:text/plain;base64,'.base64_encode($data), 'rb'); // base64 encoded data
    ?>

    Demonstration of invalid usage:
    <?php
    $data     = 'Günther says: 1+1 is 2, 10%40 is 20.';

    $fp = fopen('data:text/plain,'.$data, 'rb'); // INVALID, never do this
    echo stream_get_contents($fp);
    // Günther says: 1 1 is 2, 10@ is 20. // ERROR

    $fp = fopen('data:text/plain,'.urlencode($data), 'rb'); // urlencoded data
    echo stream_get_contents($fp);
    // Günther says: 1+1 is 2, 10%40 is 20. // OK

    // Valid option 1: base64 encoded data
    $fp = fopen('data:text/plain;base64,'.base64_encode($data), 'rb'); // base64 encoded data
    echo stream_get_contents($fp);
    // Günther says: 1+1 is 2, 10%40 is 20. // OK
    ?>
    up
    12
    admin deskbitz net
    14 years ago
    If you want to create a gd-image directly out of a sql-database-field you might want to use:

    <?php
    $jpegimage     = imagecreatefromjpeg("data://image/jpeg;base64," . base64_encode($sql_result_array['imagedata']));
    ?>

    this goes also for gif, png, etc using the correct "imagecreatefrom$$$"-function and mime-type.
    up
    2
    sandaimespaceman at gmail dot com
    16 years ago
    Now PHP supports data: protocol w/out "//" like data:text/plain, not data://text/plain,

    I tried it.
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