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    stream_set_blocking

    (PHP 4 >= 4.3.0, PHP 5, PHP 7)

    stream_set_blocking — Set blocking/non-blocking mode on a stream

    Descrierea

    stream_set_blocking ( resource $stream , bool $enable ) : bool

    Sets blocking or non-blocking mode on a stream.

    This function works for any stream that supports non-blocking mode (currently, regular files and socket streams).

    Parametri

    stream

    The stream.

    enable

    If enable is false, the given stream will be switched to non-blocking mode, and if true, it will be switched to blocking mode. This affects calls like fgets() and fread() that read from the stream. In non-blocking mode an fgets() call will always return right away while in blocking mode it will wait for data to become available on the stream.

    Valorile întoarse

    Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

    Note

    Notă:

    This function was previously called as set_socket_blocking() and later socket_set_blocking() but this usage is deprecated.

    Notă:

    On Windows, this has no affect on local files. Non-blocking IO for local files is not supported on Windows.

    A se vedea și

    • stream_select() - Runs the equivalent of the select() system call on the given arrays of streams with a timeout specified by tv_sec and tv_usec
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    User Contributed Notes 3 notes

    up
    32
    Anonymous
    11 years ago
    On Windows this function does not work with pipes opened with proc_open (https://bugs.php.net/bug.php?id=47918, https://bugs.php.net/bug.php?id=34972, https://bugs.php.net/bug.php?id=51800)
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    14
    MagicalTux at ookoo dot org
    18 years ago
    When you use fwrite() on a non-blocking stream, data isn't discarded silently as t dot starling said.

    Remember that fwrite() returns an int, and this int represents the amount of data really written to the stream. So, if you see that fwrite() returns less than the amount of written data, it means you'll have to call fwrite() again in the future to write the remaining amount of data.

    You can use stream_select() to wait for the stream to be available for writing, then continue writing data to the stream.

    Non-blocking streams are useful as you can have more than one non-blocking stream, and wait for them to be available for writing.
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    -36
    ayon at hyurl dot com
    7 years ago
    It is necessary to be noted that stream_set_blocking() and stream_set_timeout() does not work width standard I/O streams, such as STDIN and STDOUT.
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