一個php的頁面緩存類-php教程-PHP中文網

一個php的頁面緩存類

WBOY

發布： 2016-07-25 09:10:33

原創

1093 人瀏覽過

/* $cache = new Cache("../cache/",20); // 建構子，建立快取類別物件
$cache->PutCache(); // 倒出快取
*/
class Cache
{
private $CacheDir = 'Cache'; /* 快取目錄*/
private $SetTimeOut = 10; /* 快取過期時間*/
private $SetExt = '.cache'; /* 快取檔案後綴名稱*/
private $CacheFileUrl = ''; /*快取檔案所在位址*/
private $CacheConfigFile = ''; /* 快取檔案設定資訊*/
public $LastUnixTimePoke = 0; /* 上一次快取的Unix 時間戳* /
public $CurrentUnixTimePoke = 0;/* 目前快取的Unix 時間戳*/
public $NextUnixTimePoke = 0; /* 下次快取的Unix 時間戳*/
public $UnixNowToNext = 0; /Next = 0; / * 現在和下次快取相差的Unix 時間戳*/
public $LastTimePoke = 0; /* 上一次快取的時間*/
public $CurrentTimePoke = 0;/* 目前快取的時間*/
public $NextTimePoke = 0; /* 下次快取的時間*/
public $DataLength = 0; /* 快取區內容長度*/
public $CacheToPage = ''; /* 快取檔案內容*/
private $SplitTeam = false; /* 是否分組存放Cache檔案*/
public $Cache = false; /*是否需要緩存，用戶外界判斷*/
private $_IsCache = false; /* 是否能夠緩存*/
public function Cache($SetTimeOut = 20 ,$CacheDir = 'Cache',$SplitTeam = false,$SetExt = '.cache')
{
$this->CacheDir = $CacheDir;
$this->SplitTeam = $SplitTeam;
if(!is_numeric($SetTimeOut))
{
$this->ErrResponse('快取過期時間設定無效');
return false;
} else {
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}
$this->SetExt = $SetExt;
/* 快取開始*/
ob_clean();
ob_start ();
ob_implicit_flush(0);
$this->CreateCache();
return true;
}
private function CreateCache()
{
$_CacheFile = str_replace('.','_',basename($_SERVER['PHP_SELF'])) . '_' .
md5(basename($_SERVER['PHP_SELF'])) . $this->SetExt;
$_CacheConfig = str_replace('.','_',basename($_SERVER['PHP_SELF'])) . '_' . '.cof';
if(!file_exists($this->CacheDir))
{
mkdir($this->CacheDir,0777);
}
if($ this->SplitTeam)
{
$_CacheConfigDir = $this->CacheDir . str_replace('.','_',basename($_SERVER['PHP_SELF'])) . '_/';
if(!file_exists($_CacheConfigDir))
{
mkdir($_CacheConfigDir,0777);
}
$_CacheUrl = $this->CacheDir .PacheDirache. $_CacheConfigUrl = $this->CacheDir . $_CacheConfigDir . $_CacheConfig;
} else {
$_CacheUrl = $this->CacheDir . $_CacheFile;}
if(!file_exists($_CacheUrl))
{
$hanld = @fopen($_CacheUrl,"w");
@fclose ($hanld);
}
if(!file_exists($_CacheConfigUrl))
{
$hanld = @fopen($_CacheConfigUrl,"w");
@fclose($hanld);
}
$this->CacheConfigFile = $_CacheConfigUrl;
$this->CacheFileUrl = $_CacheUrl;
$this->$this- >CheckCache();
return true;
}
private function CheckCache()
{
$_FileEditTime = @filemtime($this->CacheFileUrl);
$_TimeOut = $this->SetTimeOut;
;
$_IsTimeOut = $_FileEditTime $_TimeOut;
$this->LastUnixTimePoke = $_FileEditTime;
$this->NextUnixTimePoke = $_IsTimeOut;
$this->CurrentUnix );
$this->UnixNowToNext = $this->NextUnixTimePoke - time();
$this->LastTimePoke = date("Y-m-d H:i:s",$_FileEditTime );
$this->NextTimePoke = date("Y-m-d H:i:s",$_IsTimeOut);
$this->CurrentTimePoke = date("Y-m-d H:i:s",time()) ;
$_TxtInformation = "上次快取時間戳記: $this->LastUnixTimePoke ";
$_TxtInformation .= "目前快取時間戳: $this->CurrentUnixTimePoke ";
$_TxtInformation .= "下次快取時間戳: $this->NextUnixTimePoke ";
$_TxtInformation .= "上次快取時間: $this->LastTimePoke ";
$ _TxtInformation .= "目前快取時間: $this->CurrentTimePoke ";
$_TxtInformation .= "下次快取時間: $this->NextTimePoke ";
$_TxtInformation .= "距離下次快取戳記: $this->UnixNowToNext ";
$handl = @fopen($this->CacheConfigFile,'w');
if($handl)
{
@fwrite($handl,$_TxtInformation);
@fclose($handl);
}
if($_IsTimeOut >= time())
{
$this->GetCacheData();
}
}
private function ClearCacheFile()
{
@unlink($this- >CacheFileUrl);
@unlink($this->CacheConfigFile);
}
public function PutCache()
{
$this->DataLength = ob_get_length ();
$PutData = ob_get_contents();
if(!file_exists($this->CacheFileUrl))
{
$CreateOK = $this->CreateCache();
if (!$CreateOK)
{
$this->ErrResponse('檢查快取檔案時產生錯誤，快取檔案建立失敗');
return false;
}
} else {
$hanld = @fopen($this->CacheFileUrl,"w");
if($hanld)
{
if(@is_writable($this-> CacheFileUrl))
{
@flock($hanld, LOCK_EX);
$_PutData = @fwrite($hanld,$PutData);
@flock($hanld, LOCK_UN);
UN);
if(!$_PutData)
{
$this->ErrResponse('無法更改目前快取檔案內容');
return false;
} else {
@fclose($hanld) ;
return true;
}
} else {
$this->ErrResponse('快取檔案不可寫');
return false;
}
} else {
$this->ErrResponse('開啟快取檔案發生致命錯誤');
return false;
}
}
}
public function GetCacheData()
{
$hanld = @fopen($this->CacheFileUrl,"r");
if($hanld)
{
if( @is_readable($this->CacheFileUrl))
{
$this->CacheToPage = @file_get_contents($this->CacheFileUrl);
$IsEmpty = count(file($this->CacheFileUrl); ; //判斷快取檔案是否為空
if($IsEmpty > 0)
{
echo $this->CacheToPage;
@fclose($hanld);
ob_end_flush();
exit();
}
} else {
$this->ErrResponse('讀取快取檔案內容失敗');
return false;
}
} else {
$this->ErrResponse('開啟快取檔案失敗');
return false;
}
}
}
}
private function ErrResponse($Msg)
{

echo $Msg;

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