stream_isatty

(PHP 7 >= 7.2.0, PHP 8)

stream_isatty — Check if a stream is a TTY

说明

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.

参数

stream

返回值

成功时返回 true， 或者在失败时返回 false。

范例

示例 #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