diff --git a/PhpStormStubsMap.php b/PhpStormStubsMap.php
index d208337a..a10cc4ab 100644
--- a/PhpStormStubsMap.php
+++ b/PhpStormStubsMap.php
@@ -647,6 +647,14 @@ const CLASSES = array (
   'ZendAPI_Job' => 'zend/zend.php',
   'ZendAPI_Queue' => 'zend/zend.php',
   'ZipArchive' => 'zip/zip.php',
+  'Zookeeper' => 'zookeeper/zookeeper.php',
+  'ZookeeperAuthenticationException' => 'zookeeper/zookeeper.php',
+  'ZookeeperConnectionException' => 'zookeeper/zookeeper.php',
+  'ZookeeperException' => 'zookeeper/zookeeper.php',
+  'ZookeeperMarshallingException' => 'zookeeper/zookeeper.php',
+  'ZookeeperNoNodeException' => 'zookeeper/zookeeper.php',
+  'ZookeeperOperationTimeoutException' => 'zookeeper/zookeeper.php',
+  'ZookeeperSessionException' => 'zookeeper/zookeeper.php',
   '__PHP_Incomplete_Class' => 'standard/standard_0.php',
   '___PHPSTORM_HELPERS\\PS_UNRESERVE_PREFIX_static' => 'standard/_types.php',
   '___PHPSTORM_HELPERS\\PS_UNRESERVE_PREFIX_this' => 'standard/_types.php',
diff --git a/zookeeper/zookeeper.php b/zookeeper/zookeeper.php
new file mode 100644
index 00000000..8063596b
--- /dev/null
+++ b/zookeeper/zookeeper.php
@@ -0,0 +1,417 @@
+<?php
+
+/**
+ * Zookeeper class.
+ * @link https://www.php.net/manual/en/class.zookeeper.php
+ */
+class Zookeeper
+{
+    /* class constants */
+    const PERM_READ   = 1;
+    const PERM_WRITE  = 2;
+    const PERM_CREATE = 4;
+    const PERM_DELETE = 8;
+    const PERM_ADMIN  = 16;
+    const PERM_ALL    = 31;
+
+    const EPHEMERAL = 1;
+    const SEQUENCE  = 2;
+
+    const EXPIRED_SESSION_STATE = -112;
+    const AUTH_FAILED_STATE     = -113;
+    const CONNECTING_STATE      = 1;
+    const ASSOCIATING_STATE     = 2;
+    const CONNECTED_STATE       = 3;
+    const NOTCONNECTED_STATE    = 999;
+
+    const CREATED_EVENT     = 1;
+    const DELETED_EVENT     = 2;
+    const CHANGED_EVENT     = 3;
+    const CHILD_EVENT       = 4;
+    const SESSION_EVENT     = -1;
+    const NOTWATCHING_EVENT = -2;
+
+    const LOG_LEVEL_ERROR = 1;
+    const LOG_LEVEL_WARN  = 2;
+    const LOG_LEVEL_INFO  = 3;
+    const LOG_LEVEL_DEBUG = 4;
+
+    const SYSTEMERROR          = -1;
+    const RUNTIMEINCONSISTENCY = -2;
+    const DATAINCONSISTENCY    = -3;
+    const CONNECTIONLOSS       = -4;
+    const MARSHALLINGERROR     = -5;
+    const UNIMPLEMENTED        = -6;
+    const OPERATIONTIMEOUT     = -7;
+    const BADARGUMENTS         = -8;
+    const INVALIDSTATE         = -9;
+    /**
+     * @since 3.5
+     */
+    const NEWCONFIGNOQUORUM = -13 ;
+    /**
+     * @since 3.5
+     */
+    const RECONFIGINPROGRESS = -14 ;
+
+    const OK                      = 0;
+    const APIERROR                = -100;
+    const NONODE                  = -101;
+    const NOAUTH                  = -102;
+    const BADVERSION              = -103;
+    const NOCHILDRENFOREPHEMERALS = -108;
+    const NODEEXISTS              = -110;
+    const NOTEMPTY                = -111;
+    const SESSIONEXPIRED          = -112;
+    const INVALIDCALLBACK         = -113;
+    const INVALIDACL              = -114;
+    const AUTHFAILED              = -115;
+    const CLOSING                 = -116;
+    const NOTHING                 = -117;
+    const SESSIONMOVED            = -118;
+
+    /**
+     * Create a handle to used communicate with zookeeper.
+     * If the host is provided, attempt to connect.
+     *
+     * @param string   $host
+     * @param callable $watcher_cb
+     * @param int      $recv_timeout
+     *
+     * @link https://www.php.net/manual/en/zookeeper.construct.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when host is provided and when failed to connect to the host
+     */
+    public function __construct($host = '', $watcher_cb = null, $recv_timeout = 10000)
+    {
+    }
+
+    /**
+     * Create a handle to used communicate with zookeeper.
+     *
+     * @param string   $host
+     * @param callable $watcher_cb
+     * @param int      $recv_timeout
+     *
+     * @link https://www.php.net/manual/en/zookeeper.connect.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when failed to connect to Zookeeper
+     */
+    public function connect($host, $watcher_cb = null, $recv_timeout = 10000)
+    {
+    }
+
+    /**
+     * Close the zookeeper handle and free up any resources.
+     *
+     * @link https://www.php.net/manual/en/zookeeper.close.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when closing an uninitialized instance
+     */
+    public function close()
+    {
+    }
+
+    /**
+     * Create a node synchronously.
+     *
+     * @param string $path
+     * @param string $value
+     * @param array  $acl
+     * @param int    $flags
+     *
+     * @return string
+     *
+     * @link https://www.php.net/manual/en/zookeeper.create.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperNoNodeException when parent path does not exist
+     */
+    public function create($path, $value, $acl, $flags = null)
+    {
+    }
+
+    /**
+     * Delete a node in zookeeper synchronously.
+     *
+     * @param string $path
+     * @param int    $version
+     *
+     * @return bool
+     *
+     * @link https://www.php.net/manual/en/zookeeper.delete.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperNoNodeException when path does not exist
+     */
+    public function delete($path, $version = -1)
+    {
+    }
+
+    /**
+     * Sets the data associated with a node.
+     *
+     * @param string $path
+     * @param string $data
+     * @param int    $version
+     * @param array  $stat
+     *
+     * @return bool
+     *
+     * @link https://www.php.net/manual/en/zookeeper.set.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperNoNodeException when path does not exist
+     */
+    public function set($path, $data, $version = -1, &$stat = null)
+    {
+    }
+
+    /**
+     * Gets the data associated with a node synchronously.
+     *
+     * @param string   $path
+     * @param callable $watcher_cb
+     * @param array    $stat
+     * @param int      $max_size
+     *
+     * @return string
+     *
+     * @link https://www.php.net/manual/en/zookeeper.get.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperNoNodeException when path does not exist
+     */
+    public function get($path, $watcher_cb = null, &$stat = null, $max_size = 0)
+    {
+    }
+
+    /**
+     * Get children data of a path.
+     *
+     * @param string   $path
+     * @param callable $watcher_cb
+     *
+     * @return array
+     *
+     * @link https://www.php.net/manual/en/zookeeper.getchildren.php
+     *
+     * @throws ZookeeperException       when connection not in connected status
+     * @throws ZookeeperNoNodeException when path does not exist
+     */
+    public function getChildren($path, $watcher_cb = null)
+    {
+    }
+
+    /**
+     * Checks the existence of a node in zookeeper synchronously.
+     *
+     * @param string   $path
+     * @param callable $watcher_cb
+     *
+     * @return bool
+     *
+     * @link https://www.php.net/manual/en/zookeeper.exists.php
+     *
+     * @throws ZookeeperException
+     */
+    public function exists($path, $watcher_cb = null)
+    {
+    }
+
+    /**
+     * Gets the acl associated with a node synchronously.
+     *
+     * @param string $path
+     *
+     * @return array
+     *
+     * @link https://www.php.net/manual/en/zookeeper.getacl.php
+     *
+     * @throws ZookeeperException when connection not in connected status
+     */
+    public function getAcl($path)
+    {
+    }
+
+    /**
+     * Sets the acl associated with a node synchronously.
+     *
+     * @param string $path
+     * @param int    $version
+     * @param array  $acls
+     *
+     * @link https://www.php.net/manual/en/zookeeper.setacl.php
+     *
+     * @return bool
+     *
+     * @throws ZookeeperException when connection not in connected status
+     */
+    public function setAcl($path, $version, $acls)
+    {
+    }
+
+    /**
+     * return the client session id, only valid if the connections is currently connected
+     * (ie. last watcher state is ZOO_CONNECTED_STATE).
+     *
+     * @return int
+     *
+     * @link https://www.php.net/manual/en/zookeeper.getclientid.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function getClientId()
+    {
+    }
+
+    /**
+     * Set a watcher function.
+     *
+     * @param callable $watcher_cb
+     *
+     * @return bool
+     *
+     * @link https://www.php.net/manual/en/zookeeper.setwatcher.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function setWatcher($watcher_cb)
+    {
+    }
+
+    /**
+     * Get the state of the zookeeper connection.
+     *
+     * @return int
+     *
+     * @link https://www.php.net/manual/en/zookeeper.getstate.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function getState()
+    {
+    }
+
+    /**
+     * Return the timeout for this session, only valid if the connections is currently connected
+     * (ie. last watcher state is ZOO_CONNECTED_STATE). This value may change after a server reconnect.
+     *
+     * @return int
+     *
+     * @link https://www.php.net/manual/en/zookeeper.getrecvtimeout.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function getRecvTimeout()
+    {
+    }
+
+    /**
+     * Specify application credentials.
+     *
+     * @param string   $scheme
+     * @param string   $cert
+     * @param callable $completion_cb
+     *
+     * @link https://www.php.net/manual/en/zookeeper.addauth.php
+     *
+     * @return bool
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function addAuth($scheme, $cert, $completion_cb = null)
+    {
+    }
+
+    /**
+     * Checks if the current zookeeper connection state can be recovered.
+     *
+     * @return bool
+     *
+     * @link https://www.php.net/manual/en/zookeeper.isrecoverable.php
+     *
+     * @throws ZookeeperException
+     * @throws ZookeeperConnectionException when connection not in connected status
+     */
+    public function isRecoverable()
+    {
+    }
+
+    /**
+     * Sets the stream to be used by the library for logging.
+     *
+     * TODO: might be able to set a stream like php://stderr or something
+     *
+     * @param resource $file
+     *
+     * @link https://www.php.net/manual/en/zookeeper.setlogstream.php
+     *
+     * @return bool
+     */
+    public function setLogStream($file)
+    {
+    }
+
+    /**
+     * Sets the debugging level for the library.
+     *
+     * @param int $level
+     *
+     * @link https://www.php.net/manual/en/zookeeper.setdebuglevel.php
+     *
+     * @return bool
+     */
+    public static function setDebugLevel($level)
+    {
+    }
+
+    /**
+     * Enable/disable quorum endpoint order randomization.
+     *
+     * @param bool $trueOrFalse
+     *
+     * @link https://www.php.net/manual/en/zookeeper.setdeterministicconnorder.php
+     *
+     * @return bool
+     */
+    public static function setDeterministicConnOrder($trueOrFalse)
+    {
+    }
+}
+
+class ZookeeperException extends Exception
+{
+}
+
+class ZookeeperOperationTimeoutException extends ZookeeperException
+{
+}
+
+class ZookeeperConnectionException extends ZookeeperException
+{
+}
+
+class ZookeeperMarshallingException extends ZookeeperException
+{
+}
+
+class ZookeeperAuthenticationException extends ZookeeperException
+{
+}
+
+class ZookeeperSessionException extends ZookeeperException
+{
+}
+
+class ZookeeperNoNodeException extends ZookeeperException
+{
+}