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Basic operation example of memcache in php_PHP tutorial

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Release： 2016-07-13 09:53:52

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Basic operation examples of memcache in PHP

This article describes the basic operations and usage of Memcache in PHP. Share it with everyone for your reference. If you are in need, please come and study it.

Basic operation examples of memcache in php

memcache demo

$server_ip = '127.0.0.1';

$server_port = 11211;

$memcache = new Memcache();

$memcache->connect($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")."
";

$memcache->delete("name1");

echo"name1:".$memcache->get("name1")."
";

$array_get = array("name1","name2","name3");

$result_get = $memcache->get($array_get);

foreach ($result_get as $key => $value) {

echo"$key:--->$value
";

}

foreach ($memcache->getStats() as $key => $value) {

echo"$key:--->$value
";

};

echo"
";

foreach($memcache->getExtendedStats() as $key => $value) {

echo"$key:--->$value
";

}

$memcache->close();

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memcache demo <🎜>$server_ip = '127.0.0.1';<🎜> <🎜>$server_port = 11211;<🎜> <🎜> <🎜> <🎜>$memcache = new Memcache();<🎜> <🎜>$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")."
"; $memcache->delete("name1"); echo "name1:".$memcache->get("name1")."
"; $array_get = array("name1","name2","name3"); $result_get = $memcache->get($array_get); foreach ($result_get as $key => $value) { echo "$key:--->$value
"; } foreach ($memcache->getStats() as $key => $value) { echo "$key:--->$value
"; }; echo"
"; foreach($memcache->getExtendedStats() as $key => $value) { echo "$key:--->$value
"; } $memcache->close(); ?>

Let’s look at a more specific example

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include('inc/common.inc.php');

if (! isset($city) || ! is_array($city) ) {

exit;

}

//print_r ($city);exit;

$mem = new Memcache();

$mem-> connect('localhost', '11211');

$expires=15*60;

//check if cache exits

if(($value = $mem-> get($city)) != FALSE) {

echo "get key from memcache: "."
";

// $return=$mem->get($city);

// echo json_encode($return);

}//if

else {

$resultJson=fetch_data();

echo count($resultJson)."
";

if(count($resultJson)==1 || empty($resultJson)){

//Get value from mysql

echo "get key from mysql:"."
";

$query="select * from pm25";

$result=mysql_query ($query) ;

while ($row = mysql_fetch_assoc($result)){

$rows[]=$row;

}

//Save the obtained value array into memcache

for($i=0;$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);

// echo json_encode($return);

}//if

else{

echo "get key from new_written mysql:"."
";

write_db($resultJson);

$query="select * from pm25";

$result=mysql_query ($query) ;

while ($row = mysql_fetch_assoc($result)){

$rows[]=$row;

}

//write memcache

for($i=0;$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);

// echo json_encode($return);

}//else

foreach ($city as $k=>$v){

$return[$k]=$mem->get($v);

}

echo json_encode($return);

function fetch_data() {

$url="http://www.example.com";

//$url="";

$data = http_get($url);

$getJson = json_decode($data, true);

return $getJson;

} //func fetch_data

function write_db($getJson){

$sql="DELETE FROM pm25";

mysql_query($sql);

//sort the json.txt

foreach ($getJson as $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

if($getJson[$i]['pm2_5']==0)

$count=0;

else

$count=1;

$sum=$getJson[$i]['pm2_5'];

for($j=$i 1;$j

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{

//insert into mysql

$result['city']=$getJson[$i]['area'];

$result['pm25']=intval($pm2_5);

$query="insert into pm25(city,pm25) values ('".$result['city']."',".$result['pm25'].")";

mysql_query($query);

break;

}

return $getJson;

}//func write_db

$mem -> close();

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