Analyze the application of memcache in php_PHP tutorial-PHP Tutorial-php.cn

Analyze the application of memcache in php_PHP tutorial

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Release： 2016-07-21 15:06:00

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Required environment:
php 5.3.3
apache 2.2.7
mysql 5.5.8
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Extract the Memcached_1.2.5 document, execute memcached.exe -d -install under cmd
Extract the php5.3_vc6_memcachedll document, and copy the php_memcache.dll file to the ext file directory of the PHP installation directory.
Then fill in this sentence in php.ini: extension="php_memcache.dll"
Check under phpinfo() to see if the memcache extension is referenced.

Test code:

Copy code The code is as follows:

//Connect
$mem = new Memcache;
$mem->connect("127.0.0.1", 11211);
//Save data
$mem-> set('key1', 'This is first value', 0, 60);
$val = $mem->get('key1');
echo "Get key1 value: " . $val . "
";
//Replace data
$mem->replace('key1', 'This is replace value', 0, 60);
$val = $mem ->get('key1');
echo "Get key1 value: " . $val . "
";
//Save the array
$arr = array('aaa ', 'bbb', 'ccc', 'ddd');
$mem->set('key2', $arr, 0, 60);
$val2 = $mem->get( 'key2');
echo "Get key2 value: ";
print_r($val2);
echo "
";
//Delete data
$mem ->delete('key1');
$val = $mem->get('key1');
echo "Get key1 value: " . $val . "
" ;
//Clear all data
$mem->flush();
$val2 = $mem->get('key2');
echo "Get key2 value: "; 
print_r($val2);
echo "
";
//Close the connection
$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))
                                                                                                                        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 "";
}
?>



News system application: 

Copy code

The code is as follows: //==============memcache$memcachehost = '127.0.0.1';

$memcacheport = 11211;

$memcachelife = 60;
$memcache = new Memcache;
$memcache->connect($memcachehost,$memcacheport) or die ("Could not connect");
//============== News
$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);
while($row_news=$db->fetch_array($query)){
$str=$row_news['biaoti '].$db->time_out($row_news['date_time']);
$sm_news[]=array("name"=>$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);