stream_isatty

(PHP 7 >= 7.2.0)

stream_isattyCheck if a stream is a TTY

说明

bool stream_isatty ( resource $stream )

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.

参数

stream

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

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));"

以上例程的输出类似于:


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

以上例程的输出类似于:


false

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