Memcache Basic Operation Instance _php instance in PHP

Memcache basic action instances in PHP

<! DOCTYPE html>  

Let's look at a more specific example

<?php 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: '. '
	<br/> ";
	$return = $mem->get ($city);
echo Json_encode ($return);
	}//if else {$resultJson =fetch_data (); echo Count ($resultJson).
	<br/> "; if (count ($resultJson) ==1 | | empty ($resultJson)) {//from MySQL value echo "Get key from MySQL:". "
		<br/> ";
		$query = "SELECT * from PM25";
		$result =mysql_query ($query);
		while ($row = Mysql_fetch_assoc ($result)) {$rows []= $row;
			The array of acquired values is stored in memcache for ($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);
	echo Json_encode ($return); }//if
	else{echo "Get key from new_writed MySQL:".
		<br/> ";
		write_db ($resultJson);
		$query = "SELECT * from PM25";
		$result =mysql_query ($query);
		while ($row = Mysql_fetch_assoc ($result)) {$rows []= $row;
			//write memcache for ($i =0; $i <count ($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);
	echo Json_encode ($return);

}//else}//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 '];
	$PM 2_5[$key]= $row [' pm2_5 ']; } Array_multisoRT ($area, SORT_ASC, $pm 2_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]] ==0) {if ($
				getjson[$j] [' pm2_5 ']==0) {continue;
					} else{$count + +;
					$sum + + $getJson [$j] [' pm2_5 '];
				$PM 2_5= $sum/$count;
				} else{//insert into the MySQL $result [' City ']= $getJson [$i] [' area '];
				$result [' Pm25 ']=intval ($pm 2_5);
				$query = "INSERT into PM25 (CITY,PM25) VALUES ('". $result [' City ']. "'," $result [' pm25 ']. ")";
				mysql_query ($query);
			Break
}} return $getJson;

 }//func write_db $mem-> Close ();?>

The above is the entire contents of this article, I hope you can enjoy.