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。