How to check with PHP if the script is being run from the console or browser request?

Question

I tried things like $_ENV[\'CLIENTNAME\'] == \'Console\' but that seems to work on only certain OS\'s (worked in windows, not linux).

I tried !empty($_ENV[\'SHELL\']) b

Answer 1

One solution is to check whether STDIN is defined:

if (!defined("STDIN")) {
    die("Please run me from the console - not from a web-browser!");
}