posix_isatty

    (PHP 4, PHP 5, PHP 7, PHP 8)

    posix_isatty — Determine if a file descriptor is an interactive terminal

    说明

    posix_isatty(resource|int$file_descriptor): bool

    Determines if the file descriptor file_descriptor refers to a valid terminal type device.

    参数

    file_descriptor

    The file descriptor, which is expected to be either a file resource or an int. An int will be assumed to be a file descriptor that can be passed directly to the underlying system call.

    返回值

    Returns true if file_descriptor is an open descriptor connected to a terminal and false otherwise.

    更新日志

    版本说明
    8.3.0 Type error E_WARNINGs are now raised for integer coercions following the usual PHP type coercion semantics.

    参见

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