In CLI mode getenv('HOSTNAME') returns HOSTNAME environment variable correctly, but when called in script returns FALSE.
Why? How can I get the HOSTNAME variable in script?
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6 Answers
The HOSTNAME is not available in the environment used by Apache, though it usually IS available in the environment used by the CLI.
$hostname = gethostname();
For PHP < 5.3.0 but >= 4.2.0 use this:
$hostname = php_uname('n');
For PHP < 4.2.0 use this:
$hostname = getenv('HOSTNAME');
if(!$hostname) $hostname = trim(`hostname`);
if(!$hostname) $hostname = exec('echo $HOSTNAME');
if(!$hostname) $hostname = preg_replace('#^\w+\s+(\w+).*$#', '$1', exec('uname -a'));
Comments
HOSTNAME is not a CGI environment variable, hence not present in normal PHP scripts.
But you can alternatively use
$hostname = `hostname`; // exec backticks
Or read the system config file:
$hostname = file_get_contents("/etc/hostname"); // also only U*ix
But most PHP scripts should just use $_SERVER["SERVER_NAME"] or the client-requested $_SERVER["HTTP_HOST"]
Your environment is likely cleaned in the webserver or php-fcgi/fpm start up script, so that sensitive information about the startup account is not leaked to the webserver.
Comments
I think you want HTTP_HOST which then is empty when you access it in CLI mode.
Comments
try something like this maybe?
function getHostName()
{
//if we are in the shell return the env hostname
if(array_key_exists('SHELL', $_ENV))
{
return getenv('HOSTNAME');
}
return $_SERVER['SERVER_NAME'];
}
Comments
There also exists an ENV variable you can access via <?php print_r($_ENV); ?>.
But I get the same thing: cli has more variable than the server, but it must be configuration issue.
