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    stream_wrapper_register

    (PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

    stream_wrapper_register — Register a URL wrapper implemented as a PHP class

    Beschreibung

    stream_wrapper_register(string $protocol, string $class, int $flags = 0): bool

    Allows you to implement your own protocol handlers and streams for use with all the other filesystem functions (such as fopen(), fread() etc.).

    Parameter-Liste

    protocol

    The wrapper name to be registered. Valid protocol names must contain alphanumerics, dots (.), plusses (+), or hyphens (-) only.

    class

    The classname which implements the protocol.

    flags

    Should be set to STREAM_IS_URL if protocol is a URL protocol. Default is 0, local stream.

    Rückgabewerte

    Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.

    stream_wrapper_register() will return false if the protocol already has a handler.

    Beispiele

    Beispiel #1 How to register a stream wrapper

    <?php
    $existed     = in_array("var", stream_get_wrappers());
    if (    $existed) {
    stream_wrapper_unregister("var");
    }
    stream_wrapper_register("var", "VariableStream");
    $myvar = "";

    $fp = fopen("var://myvar", "r+");

    fwrite($fp, "line1\n");
    fwrite($fp, "line2\n");
    fwrite($fp, "line3\n");

    rewind($fp);
    while (!    feof($fp)) {
    echo     fgets($fp);
    }
    fclose($fp);
    var_dump($myvar);

    if (    $existed) {
    stream_wrapper_restore("var");
    }

    ?>

    Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    line1
line2
line3
string(18) "line1
line2
line3
"

    Siehe auch

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    User Contributed Notes 2 notes

    up
    10
    cellog at php dot net
    19 years ago
    If you plan to use your wrapper in a require_once you need to define stream_stat(). If you plan to allow any other tests like is_file()/is_dir(), you have to define url_stat().

    stream_stat() must define the size of the file, or it will never be included. url_stat() must define mode, or is_file()/is_dir()/is_executable(), and any of those functions affected by clearstatcache() simply won't work.

    It's not documented, but directories must be a mode like 040777 (octal), and files a mode like 0100666. If you wish the file to be executable, use 7s instead of 6s. The last 3 digits are exactly the same thing as what you pass to chmod. 040000 defines a directory, and 0100000 defines a file. It would be really helpful to add this to the official manual!
    up
    2
    jhannus at php dot net
    19 years ago
    It is worth noting that if your wrapper supports stream_flush() then when you flcose() your stream this function will be called prior to closing the stream.
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