update README

Author: ikilobyte

README-CN.md

@@ -90,6 +90,18 @@ for ($i = 0; $i < 10; $i++) {
     ]);
 }
 
+// Send Batch message 
+$messages = [];
+for ($i = 0;$i < 10;$i++) {
+  $messages[] = json_encode([
+        'id'    => $i,
+        'now'   => date('Y-m-d H:i:s')
+  ]);
+}
+
+$messageID = $producer->send($messages);
+echo "batch message id ${messageID}\n";
+
 // close
 $producer->close();
 
@@ -187,6 +199,20 @@ while (true) {
 $consumer->close();
 ```
 
+> 批量接收消息
+
+- 只有当生产者批量发送消息时，才能接收到批量消息。
+
+```php
+$messages = $consumer->batchReceive();
+foreach ($messages as $message) {
+    // ...
+    
+    // Ack
+    $consumer->ack($message);
+}
+```
+
 > 订阅多个主题
 
 ```php

README.md

@@ -91,6 +91,19 @@ for ($i = 0; $i < 10; $i++) {
     ]);
 }
 
+// Send Batch message 
+// The underlying protocol will automatically package these messages into a message and send it to pulsar
+$messages = [];
+for ($i = 0;$i < 10;$i++) {
+    $messages[] = json_encode([
+          'id'    => $i,
+          'now'   => date('Y-m-d H:i:s')
+    ]);
+}
+
+$messageID = $producer->send($messages);
+echo "batch message id ${messageID}\n";
+
 // close
 $producer->close();
 ```
@@ -189,6 +202,20 @@ while (true) {
 $consumer->close();
 ```
 
+> Receive Batch Message
+
+- Only when the producer sends the message in bulk can the batch message be received.
+
+```php
+$messages = $consumer->batchReceive();
+foreach ($messages as $message) {
+    // ...
+    
+    // Ack
+    $consumer->ack($message);
+}
+```
+
 > Subscribe to multiple topics
 
 ```php