PHP 8.4.2 Released!

    SyncSharedMemory::__construct

    (PECL sync >= 1.1.0)

    SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object

    Description

    public SyncSharedMemory::__construct(string $name, int $size)

    Constructs a named shared memory object.

    Parameters

    name

    The name of the shared memory object.

    Note:

    If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.

    size

    The size, in bytes, of shared memory to reserve.

    Note:

    The amount of memory cannot be resized later. Request sufficient storage up front.

    Return Values

    The new SyncSharedMemory object.

    Errors/Exceptions

    An exception is thrown if the shared memory object cannot be created or opened.

    Examples

    Example #1 SyncSharedMemory::__construct() example

    <?php
    // You will probably need to protect shared memory with other synchronization objects.
    // Shared memory goes away when the last reference to it disappears.
    $mem = new SyncSharedMemory("AppReportName", 1024);
    if (    $mem->first())
    {
    // Do first time initialization work here.
    }

    $result = $mem->write(json_encode(array("name" => "my_report.txt")));
    ?>

    See Also

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes

    There are no user contributed notes for this page.
    To Top