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<?php
namespace WebPExpress;
class PlatformInfo
{
public static function isMicrosoftIis()
{
$server = strtolower($_SERVER['SERVER_SOFTWARE']);
return ( strpos( $server, 'microsoft-iis') !== false );
}
/**
* Check if Apache handles the PHP requests (Note that duel setups are possible and ie Nginx could be handling the image requests).
*/
public static function isApache()
{
return (stripos($_SERVER['SERVER_SOFTWARE'], 'apache') !== false);
}
public static function isLiteSpeed()
{
$server = strtolower($_SERVER['SERVER_SOFTWARE']);
return ( strpos( $server, 'litespeed') !== false );
}
public static function isNginx()
{
return (stripos($_SERVER["SERVER_SOFTWARE"], 'nginx') !== false);
}
public static function isApacheOrLiteSpeed()
{
return self::isApache() || self::isLiteSpeed();
}
/**
* Check if an Apache module is available.
*
* If apache_get_modules() exists, it is used. That function is however only available in mod_php installs.
* Otherwise the Wordpress function "apache_mod_loaded" is tried, which examines phpinfo() output.
* However, it seems there is no module output on php-fpm setups.
* So on php-fpm, we cannot come with an answer.
* https://stackoverflow.com/questions/9021425/how-to-check-if-mod-rewrite-is-enabled-in-php
*
* @param string $mod Name of module - ie "mod_rewrite"
* @return boolean|null Return if module is available, or null if indeterminate
*/
public static function gotApacheModule($mod)
{
if (function_exists('apache_get_modules')) {
return in_array($mod, apache_get_modules());
}
// Revert to Wordpress method, which examines output from phpinfo as well
if (function_exists('apache_mod_loaded')) {
$result = apache_mod_loaded($mod, null);
// If we got a real result, return it.
if ($result != null) {
return $result;
}
}
// We could run shell_exec("apachectl -l"), as suggested here:
// https://stackoverflow.com/questions/9021425/how-to-check-if-mod-rewrite-is-enabled-in-php
// But it does not seem to return all modules in my php-fpm setup.
// Currently we got no more tools in this function...
// you might want to take a look at the "htaccess_capability_tester" library...
return null;
}
/**
* It is not always possible to determine if apache has a given module...
* We shall not fool anyone into thinking otherwise by providing a "got" method like Wordpress does...
*/
public static function definitelyGotApacheModule($mod)
{
return (self::gotApacheModule($mod) === true);
}
public static function definitelyNotGotApacheModule($mod)
{
return (self::gotApacheModule($mod) === false);
}
/**
* Check if mod_rewrite or IIS rewrite is available.
*
* @return boolean|null Return bool if it can be determined, or null if not
*/
public static function gotRewriteModule()
{
$gotModRewrite = self::gotApacheModule('mod_rewrite');
if (!is_null($gotModRewrite)) {
return $gotModRewrite;
}
// Got the IIS check here: https://stackoverflow.com/a/21249745/842756
// but have not tested it...
if (isset($_SERVER['IIS_UrlRewriteModule'])) {
return true;
}
return null;
}
public static function definitelyNotGotModRewrite()
{
return self::definitelyNotGotApacheModule('mod_rewrite');
}
public static function definitelyGotModEnv()
{
return self::definitelyGotApacheModule('mod_env');
}
}