Description

I ran into this issue when I try to access STDOUT with Symfony\Component\Process\PhpProcess
I dig a bit and found out the three stream constants are not available for CLI are not available without a script or certain options (.e.g -a or -r)

Here is a simplied way to reproduce.

~> php
<?php var_dump(STDOUT);
<ctrl+d>

Resulted in this output:

PHP Fatal error:  Uncaught Error: Undefined constant "STDOUT" in Standard input code:1
Stack trace:
#0 {main}
  thrown in Standard input code on line 1

But I expected this output instead:

resource(2) of type (stream)

I try to trace why there is such constraint but it seems to be there for more than 10 years. Shall we fix it or document this behavior?

PHP Version

PHP 8.2.4

Operating System

irrelevant