How can I detect STDOUT redirection in PHP CLI?

Question

I've a PHP CLI script that uses shell escape sequences for bolding, but I want to be able to disable these automatically when the script's being redirected (eg to a log file).

I can find ways to detect STDOUT redirection in everything but PHP so far... so can anyone tell me how it is done in PHP?

@bcsanches Yup - lost track of which site was which. Thanks! — Parsingphase
– Parsingphase, Commented Apr 20, 2011 at 13:32

syserr0r · Accepted Answer · 2011-04-20 12:59:53Z

3

This should give you what you want:

if(posix_isatty(STDOUT))
    echo "No Redirection";
else
    echo "Redirection!";

answered Apr 20, 2011 at 12:59

syserr0r

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1 Comment

Parsingphase Over a year ago

Thanks - exactly what I was trying to find out. Works too (but you knew that). To try and ensure it wouldn't bail in windows or non-posix systems, I've also called is_function('posix_isatty') before trying the test.

Zombo · Accepted Answer · 2020-06-21 20:39:37Z

0

For Windows, you can use this:

$b = stream_isatty(STDIN);
if ($b) {
   echo "no redirect\n";
} else {
   echo "redirect\n";
}

https://php.net/function.stream-isatty

answered Jun 21, 2020 at 20:39

Zombo

1

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