PHP Conference Nagoya 2025

    stream_isatty

    (PHP 7 >= 7.2.0, PHP 8)

    stream_isatty — Check if a stream is a TTY

    Description

    stream_isatty(resource $stream): bool

    Determines if stream stream refers to a valid terminal type device. This is a more portable version of posix_isatty(), since it works on Windows systems too.

    Parameters

    stream

    Return Values

    Returns true on success or false on failure.

    Examples

    Example #1 stream_isatty() example

    This command can be used to determine if a standard output / standard error stream is redirected to a file. 

    php -r "var_export(stream_isatty(STDERR));"

    The above example will output something similar to:


    true
    php -r "var_export(stream_isatty(STDERR));" 2>output.txt

    The above example will output something similar to:


    false

    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