php中memcache 基本操作实例
php中memcache基本操作实例
<!DOCTYPEhtml>
<html>
<head>
<title>memcachedemo</title>
<metahttp-equiv="content-type"content="text/html;chatset=utf-8">
</head>
<body>
<?php
$server_ip='127.0.0.1';
$server_port=11211;
$memcache=newMemcache();
$memcache->connect($server_ip,$server_port);
$memcache->add("name1","user_name1",MEMCACHE_COMPRESSED,0);
$memcache->add("name2","user_name2",MEMCACHE_COMPRESSED,0);
$array1=array('name1'=>'jiajiam1',
'age1'=>12,
'country'=>'china');
$memcache->add("other",$array1,MEMCACHE_COMPRESSED,20);
$memcache->set("name3","user_name3",MEMCACHE_COMPRESSED,0);
$memcache->replace("name1","user_name_relpace",MEMCACHE_COMPRESSED,0);
$memcache->replace("123","12345");
echo"name1:".$memcache->get("name1")."<br/>";
$memcache->delete("name1");
echo"name1:".$memcache->get("name1")."<br/>";
$array_get=array("name1","name2","name3");
$result_get=$memcache->get($array_get);
foreach($result_getas$key=>$value){
echo"$key:--->$value<br/>";
}
foreach($memcache->getStats()as$key=>$value){
echo"$key:--->$value<br/>";
};
echo"<br/>";
foreach($memcache->getExtendedStats()as$key=>$value){
echo"$key:--->$value<br/>";
}
$memcache->close();
?>
</body>
</html>
我们再来看个更加具体些的实例
<?php
include('inc/common.inc.php');
if(!isset($city)||!is_array($city)){
exit;
}
//print_r($city);exit;
$mem=newMemcache();
$mem->connect('localhost','11211');
$expires=15*60;
//checkifcacheexits
if(($value=$mem->get($city))!=FALSE){
echo"getkeyfrommemcache:"."<br/>";
// $return=$mem->get($city);
// echojson_encode($return);
}//if
else{
$resultJson=fetch_data();
echocount($resultJson)."<br/>";
if(count($resultJson)==1||empty($resultJson)){
//从mysql中取值
echo"getkeyfrommysql:"."<br/>";
$query="select*frompm25";
$result=mysql_query($query);
while($row=mysql_fetch_assoc($result)){
$rows[]=$row;
}
//将获取的值数组存入memcache
for($i=0;$i<count($rows);$i++){
$k[$i]=$rows[$i]['city'];
$v[$i]['city']=$rows[$i]['city'];
$v[$i]['pm25']=$rows[$i]['pm25'];
$mem->set($k[$i],$v[$i],false,$expires);
}
// $return=$mem->get($city);
// echojson_encode($return);
}//if
else{
echo"getkeyfromnew_writedmysql:"."<br/>";
write_db($resultJson);
$query="select*frompm25";
$result=mysql_query($query);
while($row=mysql_fetch_assoc($result)){
$rows[]=$row;
}
//writememcache
for($i=0;$i<count($rows);$i++){
$k[$i]=$rows[$i]['city'];
$v[$i]['city']=$rows[$i]['city'];
$v[$i]['pm25']=$rows[$i]['pm25'];
$mem->set($k[$i],$v[$i],false,$expires);
}
// $return=$mem->get($city);
// echojson_encode($return);
}//else
}//else
foreach($cityas$k=>$v){
$return[$k]=$mem->get($v);
}
echojson_encode($return);
functionfetch_data(){
$url="http://www.example.com";
//$url="";
$data=http_get($url);
$getJson=json_decode($data,true);
return$getJson;
}//funcfetch_data
functionwrite_db($getJson){
$sql="DELETEFROMpm25";
mysql_query($sql);
//sortthejson.txt
foreach($getJsonas$key=>$row){
$area[$key]=$row['area'];
$pm2_5[$key]=$row['pm2_5'];
}
array_multisort($area,SORT_ASC,$pm2_5,SORT_ASC,$getJson);
for($i=0;$i<count($getJson)-1;$i++){
if($getJson[$i]['pm2_5']==0)
$count=0;
else
$count=1;
$sum=$getJson[$i]['pm2_5'];
for($j=$i+1;$j<count($getJson);$j++,$i++){
if(strcmp($getJson[$j]['area'],$getJson[$i]['area'])==0){
if($getJson[$j]['pm2_5']==0){
continue;
}
else{
$count++;
$sum+=$getJson[$j]['pm2_5'];
$pm2_5=$sum/$count;
}
}
else{
//insertintomysql
$result['city']=$getJson[$i]['area'];
$result['pm25']=intval($pm2_5);
$query="insertintopm25(city,pm25)values('".$result['city']."',".$result['pm25'].")";
mysql_query($query);
break;
}
}
}
return$getJson;
}//funcwrite_db
$mem->close();
?>
以上所述就是本文的全部内容了，希望大家能够喜欢。