What is the standard output function in php Cli mode?

Question

In a command line program of a resident process, I want to write the standard output and error output to different files.
I know that error_log can be output, but I don’t know if there is another corresponding one. Function
This is my first time asking, the description may be a bit confusing, thank you

Answer 1

CLI-specific constants:

STDIN

STDOUT

STDERR

Reference documentation: http://php.net/manual/zh/feat...