Added Geeklog\Environment class to check for server software and web …

…server PHP interface

system/classes/Environment.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Geeklog;
+
+/**
+ * Class Environment
+ *
+ * @package Geeklog
+ */
+abstract class Environment
+{
+    // Server software types
+    const SS_APACHE = 'Apache';
+    const SS_IIS = 'IIS';
+    const SS_LITESPEED = 'LiteSpeed';
+    const SS_NGINX = 'Nginx';
+    const SS_UNKNOWN = 'unknown';
+
+    // Web server PHP interface types
+    const SI_APACHE_MODULE = 'module';
+    const SI_CGI = 'cgi';
+    const SI_CLI = 'cli';
+    const SI_FASTCGI = 'fastcgi';
+    const SI_UNKNOWN = 'unknown';
+
+    /**
+     * Return the server software
+     *
+     * @return string
+     */
+    public static function getServerSoftware()
+    {
+        if (stripos($_SERVER['SERVER_SOFTWARE'], 'apache') !== false) {
+            $retval = self::SS_APACHE;
+        } elseif (stripos($_SERVER['SERVER_SOFTWARE'], 'litespeed') !== false ||
+            (PHP_SAPI === 'litespeed')) {
+            $retval = self::SS_LITESPEED;
+        } elseif (stripos($_SERVER['SERVER_SOFTWARE'], 'nginx') !== false) {
+            $retval = self::SS_NGINX;
+        } elseif (stripos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false ||
+            (stripos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false)) {
+            $retval = self::SS_IIS;
+        } else {
+            $retval = self::SS_UNKNOWN;
+        }
+
+        return $retval;
+    }
+
+    /**
+     * Return web server PHP interface type
+     *
+     * @return string
+     */
+    public static function getServerInterface()
+    {
+        if (PHP_SAPI === 'cli') {
+            // Command Line Interface
+            $retval = self::SI_CLI;
+        } elseif ((PHP_SAPI === 'fpm-fcgi') || (PHP_SAPI === 'cgi-fcgi')) {
+            $retval = self::SI_FASTCGI;
+        } elseif (strpos(PHP_SAPI, 'cgi') !== false) {
+            $retval = self::SI_CGI;
+        } else {
+            if (strpos(PHP_SAPI, 'apache') !== false) {
+                $retval = self::SI_APACHE_MODULE;
+            } else {
+                $retval = self::SI_UNKNOWN;
+            }
+        }
+
+        return $retval;
+    }
+}