# Introspection 自我检测 ``` <pre class="calibre29">``` <span class="token4">isConnected</span><span class="token3">(</span><span class="token3">)</span> ：确定phpredis对象是否认为它已连接到服务器的方法 返回boolean <span class="token4">getHost</span><span class="token3">(</span><span class="token3">)</span>：检索我们连接到的主机或unix套接字 <span class="token4">getPort</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取我们连接的端口 <span class="token4">getDbNum</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取phpredis指向的数据库编号 <span class="token4">getTimeout</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取phpredis使用的（写）超时 <span class="token4">getReadTimeout</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取指定给phpredis的读取超时或如果我们没有连接则为FALSE <span class="token4">getPersistentID</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取phpredis正在使用的持久ID <span class="token4">getAuth</span><span class="token3">(</span><span class="token3">)</span><span class="token3">:</span>获取用于验证phpredis连接的密码 ``` ```