[浪风推荐]php的memcache应用入门教程

所需环境：

php 5.3.3

apache 2.2.7

mysql 5.5.8

解压Memcached_1.2.5文档，cmd下执行memcached.exe -d -install

将php5.3_vc6_memcachedll文档解压，将php_memcache.dll文件复制到php安装目录的ext文件目录中。

然后在php.ini 当中填上这句话：extension=”php_memcache.dll”

在phpinfo（）下查看，是否引用了memcache扩展。

测试代码：

<?php
//连接
$mem = new Memcache;
$mem->connect(“127.0.0.1″, 11211);
//保存数据
$mem->set(‘key1′, ’This is first value’, 0, 60);
$val = $mem->get(‘key1′);
echo ”Get key1 value: ” . $val .” ”;
//替换数据
$mem->replace(‘key1′, ’This is replace value’, 0, 60);
$val = $mem->get(‘key1′);
echo ”Get key1 value: ” . $val . ” ”;
//保存数组
$arr = array(‘aaa’, ’bbb’, ’ccc’, ’ddd’);
$mem->set(‘key2′, $arr, 0, 60);
$val2 = $mem->get(‘key2′);
echo ”Get key2 value: ”;
print_r($val2);
echo ” ”;
//删除数据
$mem->delete(‘key1′);
$val = $mem->get(‘key1′);
echo ”Get key1 value: ” . $val . ” ”;
//清除所有数据
$mem->flush();
$val2 = $mem->get(‘key2′);
echo ”Get key2 value: ”;
print_r($val2);
echo ” ”;
//关闭连接
$mem->close();
$memcachehost = ’192.168.10.1′;
$memcacheport = 11211;
$memcachelife = 60;
$memcache = new Memcache;
$memcache->connect($memcachehost,$memcacheport) or die (“Could not connect”);
$query=”select * from user limit 10″;
$key=md5($query);
if(!$memcache->get($key))
{
$conn=mysql_connect(“192.168.30.1″,”root”,”passwd”);
mysql_select_db(users);
$result=mysql_query($query);
while ($row=mysql_fetch_assoc($result))
{
$arr[]=$row;
}
$f = ’db’;
$memcache->add($key,serialize($arr),0,30);
$data = $arr ;
}
else{
$f = ’mem’;
$data_mem=$memcache->get($key);
$data = unserialize($data_mem);
}
echo $f;
echo ”";
//print_r($data);
foreach($data as $a)
{
echo $a[user_id]._.$a[email];
echo ”";
}
?>

新闻系统的应用：

//==============memcache
$memcachehost = ’127.0.0.1′;
$memcacheport = 11211;
$memcachelife = 60;
$memcache = new Memcache;
$memcache->connect($memcachehost,$memcacheport) or die (“Could not connect”);
//==============新闻
$sql=”SELECT id,title,left(title,16) as biaoti,date_time FROM `p_newsbase` where shenhe=’1′ order by id DESC limit 7 ”;
$query=$db->query($sql);
$key=md5($query);
$str=$row_news['biaoti'].$db->time_out($row_news['date_time']);
while($row_news=$db->fetch_array($query)){
$sm_news[]=array(“name”=>$str,”title”=>$row_news['title'],”id”=>$row_news['id'],”date_time”=>$row_news['date_time']);
}
if(!$memcache->get($key)){
$memcache->add($key,serialize($sm_news),0,$memcachelife);
}else{
$data_mem=$memcache->get($key);
$sm_news = unserialize($data_mem);
}
$smarty->assign(“sm_news”,$sm_news);

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