PHP in the command line

#!/usr/bin/env php

<?php

define('SNIPPETS_START', microtime(true));

if (defined('STDIN'))
{
    echo 'PHP version .............: ' . phpversion()         . PHP_EOL;
    echo 'Script ..................: ' . basename(__FILE__)   . PHP_EOL;
    echo 'Directory ...............: ' . dirname(__FILE__)    . PHP_EOL;
    echo 'Start time ..............: ' . SNIPPETS_START       . PHP_EOL;
    echo 'Shell user ..............: ' . shell_exec('whoami') . PHP_EOL;
}
else
{
    echo 'Console mode only!';

    exit();
}

require __DIR__ . '/vendor/autoload.php';

// do cool php stuff here ...