memcached不存在时检测memcache，解决windows没有memcached.dll的问题

library/think/cache/driver/Memcached.php

@@ -9,13 +9,57 @@
 // | Author: liu21st <liu21st@gmail.com>
 // +----------------------------------------------------------------------
 
-namespace think\cache\driver;
+namespace {
+    // 检测php环境
+    if (!extension_loaded('memcached')) {
+        if (!extension_loaded('memcache')) {
+            throw new Exception('_NOT_SUPPERT_:memcache or memcachd');
+        }
+        class Memcached extends Memcache
+        {
+            const OPT_CONNECT_TIMEOUT = 14;
+            private $timeout = 1000;
 
-use think\Cache;
+            public function addServers(array $servers = [])
-use think\Exception;
+            {
+                if(empty($servers)) return;
+                foreach ($servers as $key => $server) {
+                    if (empty($server[0])) continue;
+                    $this->addServer(
+                        $server[0], 
+                        !empty($server[1]) ? $server[1] : 11211,
+                        true, 
+                        !empty($server[2]) ? $server[1] : 1,
+                        $this->timeout > 0 ? ($this->timeout/1000) : 1
+                    );
+                }
+            }
 
-class Memcached
+            public function setOption(int $option, mixed $value)
-{
+            {
+                switch ($option) {
+                    case self::OPT_CONNECT_TIMEOUT:
+                        $this->timeout = $value;
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            public function set(string $key, mixed $value, $expiration = 0)
+            {
+                return $this->set($key, $value, MEMCACHE_COMPRESSED, $expiration);
+            }
+        }
+    }
+}
+
+namespace think\cache\driver {
+    use think\Cache;
+    use think\Exception;
+
+    class Memcached
+    {
         protected $handler = null;
         protected $options = [
             'host'    => '127.0.0.1',
@@ -32,9 +76,6 @@ class Memcached
          */
         public function __construct($options = [])
         {
-        if (!extension_loaded('memcached')) {
-            throw new Exception('_NOT_SUPPERT_:memcached');
-        }
             if (!empty($options)) {
                 $this->options = array_merge($this->options, $options);
             }
@@ -133,4 +174,5 @@ class Memcached
         {
             return $this->handler->flush();
         }
+    }
 }

library/think/session/driver/Memcached.php

@@ -8,14 +8,57 @@
 // +----------------------------------------------------------------------
 // | Author: liu21st <liu21st@gmail.com>
 // +----------------------------------------------------------------------
+namespace {
+    // 检测php环境
+    if (!extension_loaded('memcached')) {
+        if (!extension_loaded('memcache')) {
+            throw new Exception('_NOT_SUPPERT_:memcache or memcached');
+        }
+        class Memcached extends Memcache
+        {
+            const OPT_CONNECT_TIMEOUT = 14;
+            private $timeout = 1000;
 
-namespace think\session\driver;
+            public function addServers(array $servers = [])
+            {
+                if(empty($servers)) return;
+                foreach ($servers as $key => $server) {
+                    if (empty($server[0])) continue;
+                    $this->addServer(
+                        $server[0], 
+                        !empty($server[1]) ? $server[1] : 11211,
+                        true, 
+                        !empty($server[2]) ? $server[1] : 1,
+                        $this->timeout > 0 ? ($this->timeout/1000) : 1
+                    );
+                }
+            }
 
-use SessionHandler;
+            public function setOption(int $option, mixed $value)
-use think\Exception;
+            {
+                switch ($option) {
+                    case self::OPT_CONNECT_TIMEOUT:
+                        $this->timeout = $value;
+                        break;
+                    default:
+                        break;
+                }
+            }
 
-class Memcached extends SessionHandler
+            public function set(string $key, mixed $value, $expiration = 0)
-{
+            {
+                return $this->set($key, $value, MEMCACHE_COMPRESSED, $expiration);
+            }
+        }
+    }
+}
+
+namespace think\session\driver {
+    use SessionHandler;
+    use think\Exception;
+
+    class Memcached extends SessionHandler
+    {
         protected $handler = null;
         protected $config  = [
             'host'         => '127.0.0.1', // memcache主机
@@ -38,10 +81,6 @@ class Memcached extends SessionHandler
          */
         public function open($savePath, $sessName)
         {
-        // 检测php环境
-        if (!extension_loaded('memcached')) {
-            throw new Exception('_NOT_SUPPERT_:memcached');
-        }
             $this->handler = new \Memcached;
             // 设置连接超时时间（单位：毫秒）
             if ($this->config['timeout'] > 0) {
@@ -114,4 +153,5 @@ class Memcached extends SessionHandler
         {
             return true;
         }
+    }
 }