stream_isatty
PHP function
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(PHP 7 >= 7.2.0, PHP 8)
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
Success
Examples
stream_isatty() example
This command can be used to determine if a standard output / standard error stream is redirected to a file.
sh
php -r "var_export(stream_isatty(STDERR));"
The above example will output something similar to:
output
true
sh
php -r "var_export(stream_isatty(STDERR));" 2>output.txt
The above example will output something similar to:
output
false