我们学习了解了这么多关于PHP的知识，今天教你们如何快速进行php+kafka的安装，如果不会的“童鞋”，那就跟随本篇文章一起继续学习吧
1、 安装java，并设置相关的环境变量
> wget https://download.java.net/openjdk/jdk7u75/ri/openjdk-7u75-b13-linux-x64-18_dec_2014.tar.gz > tar zxvf openjdk-7u75-b13-linux-x64-18_dec_2014.tar.gz > mv java-se-7u75-ri/ /opt/ > export JAVA_HOME=/opt/java-se-7u75-ri > export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin > export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar #验证安装 > java -verison openjdk version "1.7.0_75" OpenJDK Runtime Environment (build 1.7.0_75-b13) OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)
2、安装kafka，这里以0.10.2版本为例
> wget http://archive.apache.org/dist/kafka/0.10.2.0/kafka_2.11-0.10.2.0.tgz > tar zxvf kafka_2.11-0.10.2.0.tgz > mv kafka_2.11-0.10.2.0/ /opt/kafka > cd /opt/kafka #启动zookeeper > bin/zookeeper-server-start.sh config/zookeeper.properties [2013-04-22 15:01:37,495] INFO Reading configuration from: config/zookeeper.properties (org.apache.zookeeper.server.quorum.QuorumPeerConfig) ... #启动kafka > bin/kafka-server-start.sh config/server.properties [2013-04-22 15:01:47,028] INFO Verifying properties (kafka.utils.VerifiableProperties) [2013-04-22 15:01:47,051] INFO Property socket.send.buffer.bytes is overridden to 1048576 (kafka.utils.VerifiableProperties) ... #尝试创建一个topic > bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test > bin/kafka-topics.sh --list --zookeeper localhost:2181 test #生产者写入消息 > bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test This is a message This is another message #消费者消费消息 > bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning This is a message This is another message
3、安装kafka的C操作库
> wget https://github.com/edenhill/librdkafka/archive/v1.3.0.tar.gz > tar zxvf v1.3.0.tar.gz > cd librdkafka-1.3.0 > ./configure > make && make install
4、安装php的kafka扩展 ，这里选择php-rdkafka扩展 https://github.com/arnaud-lb/php-rdkafka
> wget https://github.com/arnaud-lb/php-rdkafka/archive/4.0.2.tar.gz > tar 4.0.2.tar.gz > cd php-rdkafka-4.0.2 > /opt/php7/bin/phpize > ./configure --with-php-config=/opt/php7/bin/php-config > make && make install
修改php.ini，加入 extension=rdkafka.so
5、安装rdkafka的IDE代码提示文件
立即学习“PHP免费学习笔记（深入）”；
> composer create-project kwn/php-rdkafka-stubs php-rdkafka-stubs
以phpstrom为例，在你的项目的External Libraries右键，选择Configure PHP Include Paths，把刚刚的路径添加进来。
Zend_API 深入_PHP_内核
下载
”扩展PHP“说起来容易做起来难。PHP已经进化成一个日趋成熟的源码包几十兆大小的工具。要骇客如此复杂的一个系统，不得不学习和思考。构建本章内容时，我们最终选择了“在实战中学习”的方式。这不是最科学也不是最专业的方式，但是此方式最有趣，也得出了最好的最终结果。下面的部分，你将先快速的学习到，如何获得最基本的扩展，且这些扩展立即就可运行。然后你将学习到 Zend 的高级 API 功能，这种方式将不得
6、编写php测试代码
producer：
set('log_level', LOG_ERR);
$conf->set('debug', 'admin');
$conf->set('metadata.broker.list', 'localhost:9092');
//If you need to produce exactly once and want to keep the original produce order, uncomment the line below
//$conf->set('enable.idempotence', 'true');
$producer = new RdKafka\Producer($conf);
$topic = $producer->newTopic("test2");
for ($i = 0; $i < 10; $i++) {
$topic->produce(RD_KAFKA_PARTITION_UA, 0, "Message $i");
$producer->poll(0);
}
for ($flushRetries = 0; $flushRetries < 10; $flushRetries++) {
$result = $producer->flush(10000);
if (RD_KAFKA_RESP_ERR_NO_ERROR === $result) {
break;
}
}
if (RD_KAFKA_RESP_ERR_NO_ERROR !== $result) {
throw new \RuntimeException('Was unable to flush, messages might be lost!');
}low-level consumer：
set('log_level', LOG_ERR);
$conf->set('debug', 'admin');
// Set the group id. This is required when storing offsets on the broker
$conf->set('group.id', 'myConsumerGroup');
$rk = new RdKafka\Consumer($conf);
$rk->addBrokers("127.0.0.1");
$topicConf = new RdKafka\TopicConf();
$topicConf->set('auto.commit.interval.ms', 100);
// Set the offset store method to 'file'
$topicConf->set('offset.store.method', 'broker');
// Alternatively, set the offset store method to 'none'
// $topicConf->set('offset.store.method', 'none');
// Set where to start consuming messages when there is no initial offset in
// offset store or the desired offset is out of range.
// 'smallest': start from the beginning
$topicConf->set('auto.offset.reset', 'smallest');
$topic = $rk->newTopic("test2", $topicConf);
// Start consuming partition 0
$topic->consumeStart(0, RD_KAFKA_OFFSET_STORED);
while (true) {
$message = $topic->consume(0, 10000);
switch ($message->err) {
case RD_KAFKA_RESP_ERR_NO_ERROR:
print_r($message);
break;
case RD_KAFKA_RESP_ERR__PARTITION_EOF:
echo "No more messages; will wait for more\n";
break;
case RD_KAFKA_RESP_ERR__TIMED_OUT:
echo "Timed out\n";
break;
default:
throw new \Exception($message->errstr(), $message->err);
break;
}
}high-level consumer：
setRebalanceCb(function (RdKafka\KafkaConsumer $kafka, $err, array $partitions = null) {
switch ($err) {
case RD_KAFKA_RESP_ERR__ASSIGN_PARTITIONS:
echo "Assign: ";
var_dump($partitions);
$kafka->assign($partitions);
break;
case RD_KAFKA_RESP_ERR__REVOKE_PARTITIONS:
echo "Revoke: ";
var_dump($partitions);
$kafka->assign(NULL);
break;
default:
throw new \Exception($err);
}
});
// Configure the group.id. All consumer with the same group.id will consume
// different partitions.
$conf->set('group.id', 'myConsumerGroup');
// Initial list of Kafka brokers
$conf->set('metadata.broker.list', '127.0.0.1');
// Set where to start consuming messages when there is no initial offset in
// offset store or the desired offset is out of range.
// 'smallest': start from the beginning
$conf->set('auto.offset.reset', 'smallest');
$consumer = new RdKafka\KafkaConsumer($conf);
// Subscribe to topic 'test2'
$consumer->subscribe(['test2']);
echo "Waiting for partition assignment... (make take some time when\n";
echo "quickly re-joining the group after leaving it.)\n";
while (true) {
$message = $consumer->consume(1000);
switch ($message->err) {
case RD_KAFKA_RESP_ERR_NO_ERROR:
print_r($message);
break;
case RD_KAFKA_RESP_ERR__PARTITION_EOF:
echo "No more messages; will wait for more\n";
break;
case RD_KAFKA_RESP_ERR__TIMED_OUT:
echo "Timed out\n";
break;
default:
throw new \Exception($message->errstr(), $message->err);
break;
}
sleep(2);
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