第php如何實現(xiàn)緩存類代碼$cache=newCache(60,/any_other_path/

第一個參數(shù)是緩存秒數(shù)，第二個參數(shù)是緩存路徑，根據(jù)需要配置。

默認(rèn)情況下，緩存時間是3600秒，緩存目錄是cache/

3、讀取緩存

$value=$cache-get(data_key

4、寫入緩存

$value=$cache-put(data_key,data_value

完整實例：

$cache=newCache();

//從緩存從讀取鍵值$key的數(shù)據(jù)

$values=$cache-get($key);

//如果沒有緩存數(shù)據(jù)

if($values==false){

//insertcodehere...

//寫入鍵值$key的數(shù)據(jù)

$cache-put($key,$values);

}else{

//insertcodehere...

}

Cache.class.php

php

classCache{

private$cache_path;//pathforthecache

private$cache_expire;//secondsthatthecacheexpires

//cacheconstructor,optionalexpiringtimeandcachepath

publicfunctionCache($exp_time=3600,$path=cache/){

$this-cache_expire=$exp_time;

$this-cache_path=$path;

//returnsthefilenameforthecache

privatefunctionfileName($key){

return$this-cache_path.md5($key);

//createsnewcachefileswiththegivendata,$key==nameofthecache,datatheinfo/valuestostore

publicfunctionput($key,$data){

$values=serialize($data);

$filename=$this-fileName($key);

$file=fopen($filename,w

if($file){//abletocreatethefile

fwrite($file,$values);

fclose($file);

elsereturnfalse;

//returnscacheforthegivenkey

publicfunctionget($key){

$filename=$this-fileName($key);

if(!file_exists($filename)||!is_readable($filename)){//cantreadthecache

returnfalse;

if(time()(filemtime($filename)+$this-cache_expire)){//cacheforthekeynotexpired

$file=fopen($filename,r//readdatafile

if($file){//abletoopenthefile

$data=fread($file,filesize($filename));

fclose($file);

returnunserialize($data);//return