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Table of Contents
redis在PHP中的基本使用案例,redisPHP使用案例
php redis 怎解決回復(fù)功可以
php 連接redis,怎判斷Redis是否掛掉
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redis在PHP中的基本使用案例,redisPHP使用案例

Jun 13, 2016 am 09:24 AM
php red redis use exist Basic Case

redis在PHP中的基本使用案例,redisPHP使用案例

下載http://www.oschina.net/p/redis

解壓后里面有:lib 源文件 、examples 例子、test測試

將lib目錄拷貝到你的項目中,就可以開始你的predis操作了。

//使用autoload加載相關(guān)庫,這邊重點就是為了require $file;
spl_autoload_register(function($class) {
$file = __DIR__.’/lib/Predis/’.$class.’.php’;
if (file_exists($file)) {
require $file;
return true;
}
});

//配置連接的IP、端口、以及相應(yīng)的數(shù)據(jù)庫
$server = array(
‘host’???? => ’127.0.0.1′,
‘port’???? => 6379,
‘database’ => 15
);
$redis = new Client($server);

//普通set/get操作
$redis->set(‘library’, ‘predis’);
$retval = $redis->get(‘library’);
echo $retval; //顯示 ‘predis’

//setex set一個存儲時效
$redis->setex(‘str’, 10, ‘bar’); //表示存儲有效期為10秒

//setnx/msetnx相當(dāng)于add操作,不會覆蓋已有值
$redis->setnx(‘foo’,12); //true
$redis->setnx(‘foo’,34); //false

//getset操作,set的變種,結(jié)果返回替換前的值
$redis->getset(‘foo’,56);//返回34

// incrby/incr/decrby/decr 對值的遞增和遞減
$redis->incr(‘foo’); //foo為57
$redis->incrby(‘foo’,2); //foo為59

//exists檢測是否存在某值
$redis->exists(‘foo’);//true

//del 刪除
$redis->del(‘foo’);//true

//type 類型檢測,字符串返回string,列表返回 list,set表返回set/zset,hash表返回hash
$redis->type(‘foo’);//不存在,返回none
$redis->set(‘str’,'test’);
$redis->type(‘str’); //字符串,返回string

//append 連接到已存在字符串
$redis->append(‘str’,'_123′); //返回累加后的字符串長度8,此進(jìn)str為 ‘test_123′

//setrange 部分替換操作
$redis->setrange(‘str’,0,’abc’); //返回3,參數(shù)2為0時等同于set操作
$redis->setrange(‘str’,2,’cd’);//返回4,表示從第2個字符后替換,這時’str’為’abcd’

//substr 部分獲取操作
$redis->substr(‘str’,0,2);//表示從第0個起,取到第2個字符,共3個,返回’abc’

//strlen 獲取字符串長度
$redis->strlen(‘str’); //返回4

//setbit/getbit 位存儲和獲取
$redis->setbit(‘binary’,31,1);? //表示在第31位存入1,這邊可能會有大小端問題?不過沒關(guān)系,getbit 應(yīng)該不會有問題
$redis->getbit(‘binary’,31);??? //返回1

//keys 模糊查找功能,支持*號以及?號(匹配一個字符)
$redis->set(‘foo1′,123);
$redis->set(‘foo2′,456);
$redis->keys(‘foo*’); //返回foo1和foo2的array
$redis->keys(‘f?o?’);? //同上

//randomkey 隨機返回一個key
$redis->randomkey(); //可能是返回 ‘foo1′或者是’foo2′及其它任何一存在redis的key

//rename/renamenx 對key進(jìn)行改名,所不同的是renamenx不允許改成已存在的key
$redis->rename(‘str’,'str2′); //把原先命名為’str’的key改成了’str2′

//expire 設(shè)置key-value的時效性,ttl 獲取剩余有效期,persist 重新設(shè)置為永久存儲
$redis->expire(‘foo’, 1); //設(shè)置有效期為1秒
$redis->ttl(‘foo’); //返回有效期值1s
$redis->expire(‘foo’); //取消expire行為

//dbsize 返回redis當(dāng)前數(shù)據(jù)庫的記錄總數(shù)
$redis->dbsize();

/*
隊列操作
*/

//rpush/rpushx 有序列表操作,從隊列后插入元素
//lpush/lpushx 和rpush/rpushx的區(qū)別是插入到隊列的頭部,同上,’x'含義是只對已存在的key進(jìn)行操作
$redis->rpush(‘fooList’, ‘bar1′); //返回一個列表的長度1
$redis->lpush(‘fooList’, ‘bar0′); //返回一個列表的長度2
$redis->rpushx(‘fooList’, ‘bar2′); //返回3,rpushx只對已存在的隊列做添加,否則返回0
//llen返回當(dāng)前列表長度
$redis->llen(‘fooList’);//3

//lrange 返回隊列中一個區(qū)間的元素
$redis->lrange(‘fooList’,0,1); //返回數(shù)組包含第0個至第1個共2個元素
$redis->lrange(‘fooList’,0,-1);//返回第0個至倒數(shù)第一個,相當(dāng)于返回所有元素,注意redis中很多時候會用到負(fù)數(shù),下同

//lindex 返回指定順序位置的list元素
$redis->lindex(‘fooList’,1); //返回’bar1′

//lset 修改隊列中指定位置的value
$redis->lset(‘fooList’,1,’123′);//修改位置1的元素,返回true

//lrem 刪除隊列中左起指定數(shù)量的字符
$redis->lrem(‘fooList’,1,’_'); //刪除隊列中左起(右起使用-1)1個字符’_'(若有)

//lpop/rpop 類似棧結(jié)構(gòu)地彈出(并刪除)最左或最右的一個元素
$redis->lpop(‘fooList’); //’bar0′
$redis->rpop(‘fooList’); //’bar2′

//ltrim 隊列修改,保留左邊起若干元素,其余刪除
$redis->ltrim(‘fooList’, 0,1); //保留左邊起第0個至第1個元素

//rpoplpush 從一個隊列中pop出元素并push到另一個隊列
$redis->rpush(‘list1′,’ab0′);
$redis->rpush(‘list1′,’ab1′);
$redis->rpush(‘list2′,’ab2′);
$redis->rpush(‘list2′,’ab3′);
$redis->rpoplpush(‘list1′,’list2′);//結(jié)果list1 =>array(‘a(chǎn)b0′),list2 =>array(‘a(chǎn)b1′,’ab2′,’ab3′)
$redis->rpoplpush(‘list2′,’list2′);//也適用于同一個隊列,把最后一個元素移到頭部list2 =>array(‘a(chǎn)b3′,’ab1′,’ab2′)

//linsert 在隊列的中間指定元素前或后插入元素
$redis->linsert(‘list2′, ‘before’,'ab1′,’123′); //表示在元素’ab1′之前插入’123′
$redis->linsert(‘list2′, ‘a(chǎn)fter’,'ab1′,’456′);?? //表示在元素’ab1′之后插入’456′

//blpop/brpop 阻塞并等待一個列隊不為空時,再pop出最左或最右的一個元素(這個功能在php以外可以說非常好用)
//brpoplpush 同樣是阻塞并等待操作,結(jié)果同rpoplpush一樣
$redis->blpop(‘list3′,10); //如果list3為空則一直等待,直到不為空時將第一元素彈出,10秒后超時

/**
set表操作
*/

//sadd 增加元素,返回true,重復(fù)返回false
$redis->sadd(‘set1′,’ab’);
$redis->sadd(‘set1′,’cd’);
$redis->sadd(‘set1′,’ef’);

//srem 移除指定元素
$redis->srem(‘set1′,’cd’); //刪除’cd’元素

//spop 彈出首元素
$redis->spop(‘set1′);

//smove 移動當(dāng)前set表的指定元素到另一個set表
$redis->sadd(‘set2′,’123′);
$redis->smove(‘set1′,’set2′,’ab’);//移動’set1′中的’ab’到’set2′,返回true or false

//scard 返回當(dāng)前set表元素個數(shù)
$redis->scard(‘set2′);//2

//sismember 判斷元素是否屬于當(dāng)前表
$redis->sismember(‘set2′,’123′); //true or false

//smembers 返回當(dāng)前表的所有元素
$redis->smembers(‘set2′); //array(’123′,’ab’);

//sinter/sunion/sdiff? 返回兩個表中元素的交集/并集/補集
$redis->sadd(‘set1′,’ab’);
$redis->sinter(‘set2′,’set1′); //返回array(‘a(chǎn)b’)

//sinterstore/sunionstore/sdiffstore 將兩個表交集/并集/補集元素copy到第三個表中
$redis->set(‘foo’,0);
$redis->sinterstore(‘foo’,'set1′); //這邊等同于將’set1′的內(nèi)容copy到’foo’中,并將’foo’轉(zhuǎn)為set表
$redis->sinterstore(‘foo’,array(‘set1′,’set2′)); //將’set1′和’set2′中相同的元素copy到’foo’表中,覆蓋’foo’原有內(nèi)容

//srandmember 返回表中一個隨機元素
$redis->srandmember(‘set1′);

/**
有序set表操作
*/

//sadd 增加元素,并設(shè)置序號,返回true,重復(fù)返回false
$redis->zadd(‘zset1′,1,’ab’);
$redis->zadd(‘zset1′,2,’cd’);
$redis->zadd(‘zset1′,3,’ef’);

//zincrby 對指定元素索引值的增減,改變元素排列次序
$redis->zincrby(‘zset1′,10,’ab’);//返回11

//zrem 移除指定元素
$redis->zrem(‘zset1′,’ef’); //true or false

//zrange 按位置次序返回表中指定區(qū)間的元素
$redis->zrange(‘zset1′,0,1); //返回位置0和1之間(兩個)的元素
$redis->zrange(‘zset1′,0,-1);//返回位置0和倒數(shù)第一個元素之間的元素(相當(dāng)于所有元素)

//zrevrange 同上,返回表中指定區(qū)間的元素,按次序倒排
$redis->zrevrange(‘zset1′,0,-1); //元素順序和zrange相反

//zrangebyscore/zrevrangebyscore 按順序/降序返回表中指定索引區(qū)間的元素
$redis->zadd(‘zset1′,3,’ef’);
$redis->zadd(‘zset1′,5,’gh’);
$redis->zrangebyscore(‘zset1′,2,9); //返回索引值2-9之間的元素 array(‘ef’,'gh’)
//參數(shù)形式
$redis->zrangebyscore(‘zset1′,2,9,’withscores’); //返回索引值2-9之間的元素并包含索引值 array(array(‘ef’,3),array(‘gh’,5))
$redis->zrangebyscore(‘zset1′,2,9,array(‘withscores’ =>true,’limit’=>array(1, 2))); //返回索引值2-9之間的元素,’withscores’ =>true表示包含索引值; ‘limit’=>array(1, 2),表示最多返回2條,結(jié)果為array(array(‘ef’,3),array(‘gh’,5))

//zunionstore/zinterstore 將多個表的并集/交集存入另一個表中
$redis->zunionstore(‘zset3′,array(‘zset1′,’zset2′,’zset0′)); //將’zset1′,’zset2′,’zset0′的并集存入’zset3′
//其它參數(shù)
$redis->zunionstore(‘zset3′,array(‘zset1′,’zset2′),array(‘weights’ => array(5,0)));//weights參數(shù)表示權(quán)重,其中表示并集后值大于5的元素排在前,大于0的排在后
$redis->zunionstore(‘zset3′,array(‘zset1′,’zset2′),array(‘a(chǎn)ggregate’ => ‘max’));//’aggregate’ => ‘max’或’min’表示并集后相同的元素是取大值或是取小值

//zcount 統(tǒng)計一個索引區(qū)間的元素個數(shù)
$redis->zcount(‘zset1′,3,5);//2
$redis->zcount(‘zset1′,’(3′,5)); //’(3′表示索引值在3-5之間但不含3,同理也可以使用’(5′表示上限為5但不含5

//zcard 統(tǒng)計元素個數(shù)
$redis->zcard(‘zset1′);//4

//zscore 查詢元素的索引
$redis->zscore(‘zset1′,’ef’);//3

//zremrangebyscore 刪除一個索引區(qū)間的元素
$redis->zremrangebyscore(‘zset1′,0,2); //刪除索引在0-2之間的元素(‘a(chǎn)b’,'cd’),返回刪除元素個數(shù)2

//zrank/zrevrank 返回元素所在表順序/降序的位置(不是索引)
$redis->zrank(‘zset1′,’ef’);//返回0,因為它是第一個元素;zrevrank則返回1(最后一個)

//zremrangebyrank 刪除表中指定位置區(qū)間的元素
$redis->zremrangebyrank(‘zset1′,0,10); //刪除位置為0-10的元素,返回刪除的元素個數(shù)2

/**
hash表操作
*/

//hset/hget 存取hash表的數(shù)據(jù)
$redis->hset(‘hash1′,’key1′,’v1′); //將key為’key1′ value為’v1′的元素存入hash1表
$redis->hset(‘hash1′,’key2′,’v2′);
$redis->hget(‘hash1′,’key1′);? //取出表’hash1′中的key ‘key1′的值,返回’v1′

//hexists 返回hash表中的指定key是否存在
$redis->hexists (‘hash1′,’key1′); //true or false

//hdel 刪除hash表中指定key的元素
$redis->hdel(‘hash1′,’key2′); //true or false

//hlen 返回hash表元素個數(shù)
$redis->hlen(‘hash1′); //1

//hsetnx 增加一個元素,但不能重復(fù)
$redis->hsetnx(‘hash1′,’key1′,’v2′); //false
$redis->hsetnx(‘hash1′,’key2′,’v2′); //true

//hmset/hmget 存取多個元素到hash表
$redis->hmset(‘hash1′,array(‘key3′=>’v3′,’key4′=>’v4′));
$redis->hmget(‘hash1′,array(‘key3′,’key4′)); //返回相應(yīng)的值 array(‘v3′,’v4′)

//hincrby 對指定key進(jìn)行累加
$redis->hincrby(‘hash1′,’key5′,3); //返回3
$redis->hincrby(‘hash1′,’key5′,10); //返回13

//hkeys 返回hash表中的所有key
$redis->hkeys(‘hash1′); //返回array(‘key1′,’key2′,’key3′,’key4′,’key5′)

//hvals 返回hash表中的所有value
$redis->hvals(‘hash1′); //返回array(‘v1′,’v2′,’v3′,’v4′,13)

//hgetall 返回整個hash表元素
$redis->hgetall(‘hash1′); //返回array(‘key1′=>’v1′,’key2′=>’v2′,’key3′=>’v3′,’key4′=>’v4′,’key5′=>13)

/**
排序操作
*/

//sort 排序
$redis->rpush(‘tab’,3);
$redis->rpush(‘tab’,2);
$redis->rpush(‘tab’,17);
$redis->sort(‘tab’);? //返回array(2,3,17)
//使用參數(shù),可組合使用 array(‘sort’ => ‘desc’,'limit’ => array(1, 2))
$redis->sort(‘tab’,array(‘sort’ => ‘desc’));? //降序排列,返回array(17,3,2)
$redis->sort(‘tab’,array(‘limit’ => array(1, 2)));? //返回順序位置中1的元素2個(這里的2是指個數(shù),而不是位置),返回array(3,17)
$redis->sort(‘tab’,array(‘limit’ => array(‘a(chǎn)lpha’ => true))); //按首字符排序返回array(17,2,3),因為17的首字符是’1′所以排首位置
$redis->sort(‘tab’,array(‘limit’ => array(‘store’ => ‘ordered’))); //表示永久性排序,返回元素個數(shù)
$redis->sort(‘tab’,array(‘limit’ => array(‘get’ => ‘pre_*’))); //使用了通配符’*'過濾元素,表示只返回以’pre_’開頭的元素

/**
redis管理操作
*/

//select 指定要操作的數(shù)據(jù)庫
$redis->select(‘mydb’); //指定為mydb,不存在則創(chuàng)建

//flushdb 清空當(dāng)前庫
$redis->flushdb();

//move 移動當(dāng)庫的元素到其它庫
$redis->set(‘foo’, ‘bar’);
$redis->move(‘foo’, ‘mydb2′); //若’mydb2′庫存在

//info 顯示服務(wù)當(dāng)狀態(tài)信息
$redis->info();

//slaveof 配置從服務(wù)器
$redis->slaveof(’127.0.0.1′,80); //配置127.0.0.1端口80的服務(wù)器為從服務(wù)器
$redis->slaveof(); //清除從服務(wù)器

//同步保存服務(wù)器數(shù)據(jù)到磁盤
$redis->save();
//異步保存服務(wù)器數(shù)據(jù)到磁盤
$redis->bgsave();
//??
$redis->bgrewriteaof();
//返回最后更新磁盤的時間
$redis->lastsave();

//set/get多個key-value
$mkv = array(
‘usr:0001′ => ‘First user’,
‘usr:0002′ => ‘Second user’,
‘usr:0003′ => ‘Third user’
);
$redis->mset($mkv); //存儲多個key對應(yīng)的value
$retval = $redis->mget(array_keys($mkv)); //獲取多個key對應(yīng)的value
print_r($retval);

//批量操作
$replies = $redis->pipeline(function($pipe) {
$pipe->ping();
$pipe->flushdb();
$pipe->incrby(‘counter’, 10); //增量操作
$pipe->incrby(‘counter’, 30);
$pipe->exists(‘counter’);
$pipe->get(‘counter’);
$pipe->mget(‘does_not_exist’, ‘counter’);
});
print_r($replies);

//CAS,事務(wù)性操作

function zpop($client, $zsetKey) {
$element = null;
$options = array(
‘cas’?? => true,???? // Initialize with support for CAS operations
‘watch’ => $zsetKey, // Key that needs to be WATCHed to detect changes
‘retry’ => 3,??????? // Number of retries on aborted transactions, after
// which the client bails out with an exception.
);

$txReply = $client->multiExec($options, function($tx)
use ($zsetKey, &$element) {
@list($element) = $tx->zrange($zsetKey, 0, 0);
if (isset($element)) {
$tx->multi();???? // With CAS, MULTI *must* be explicitly invoked.
$tx->zrem($zsetKey, $element);
}
});
return $element;
}
$zpopped = zpop($redis, ‘zset’);
echo isset($zpopped) ? “ZPOPed $zpopped” : “Nothing to ZPOP!”, “\n”;

//對存取的key加前綴,如: ‘nrk:’
$redis->getProfile()->setPreprocessor(new KeyPrefixPreprocessor(‘nrk:’));

//分布式存儲的一些方法
$multiple_servers = array(
array(
‘host’???? => ’127.0.0.1′,
‘port’???? => 6379,
‘database’ => 15,
‘a(chǎn)lias’??? => ‘first’,
),
array(
‘host’???? => ’127.0.0.1′,
‘port’???? => 6380,
‘database’ => 15,
‘a(chǎn)lias’??? => ‘second’,
),
);

use Predis\Distribution\IDistributionStrategy;

class NaiveDistributionStrategy implements IDistributionStrategy {
private $_nodes, $_nodesCount;

public function __constructor() {
$this->_nodes = array();
$this->_nodesCount = 0;
}

public function add($node, $weight = null) {
$this->_nodes[] = $node;
$this->_nodesCount++;
}

public function remove($node) {
$this->_nodes = array_filter($this->_nodes, function($n) use($node) {
return $n !== $node;
});
$this->_nodesCount = count($this->_nodes);
}

public function get($key) {
$count = $this->_nodesCount;
if ($count === 0) {
throw new RuntimeException(‘No connections’);
}
return $this->_nodes[$count > 1 ? abs(crc32($key) % $count) : 0];
}

public function generateKey($value) {
return crc32($value);
}
}

//配置鍵分布策略
$options = array(
‘key_distribution’ => new NaiveDistributionStrategy(),
);

$redis = new Predis\Client($multiple_servers, $options);

for ($i = 0; $i set(“key:$i”, str_pad($i, 4, ’0′, 0));
$redis->get(“key:$i”);
}

$server1 = $redis->getClientFor(‘first’)->info();
$server2 = $redis->getClientFor(‘second’)->info();

printf(“Server ‘%s’ has %d keys while server ‘%s’ has %d keys.\n”,
‘first’, $server1['db15']['keys'], ‘second’, $server2['db15']['keys']

php redis 怎解決回復(fù)功可以

redis會將數(shù)據(jù)存儲在內(nèi)存中,斷電丟失。這個要注意一下,如有必要就做個持久化。持久化的方法一言難盡,可以參考網(wǎng)上的文章。

php的redis擴展叫php-redis。網(wǎng)上有php-redis的中文手冊,下面給你一個示例:
connect('127.0.0.1', 6379); // 6379是默認(rèn)端口$result = $redis->set('9639002718',"comment"); // 設(shè)置鍵值echo $result = $redis->get('9639002718'); // 獲取鍵值$all = $redis->getMultiple(array('9639002718', '9639002718')); // 同時獲得多個鍵值// 沒有提供獲得所有鍵值的方法。下面這句我不確定是否能用,你可以試一試。$all = $redis->getMultiple(array('*'));
望采納,謝謝支持!

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php 連接redis,怎判斷Redis是否掛掉

通過redis ping 命令
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