一個php的頁面緩衝類

/* $cache = new Cache("../cache/",20); // 建構函式，建立緩衝類對象 $cache->PutCache(); // 倒出緩衝 */ class Cache { private $CacheDir = ’Cache’; /* 緩衝目錄 */ private $SetTimeOut = 10; /* 緩衝到期時間 */ private $SetExt = ’.cache’; /* 快取檔案尾碼名 */ private $CacheFileUrl = ’’; /* 快取檔案所在地址 */ private $CacheConfigFile = ’’; /* 快取檔案配置資訊 */ public $LastUnixTimePoke = 0; /* 上一次緩衝的 Unix 時間戳記 */ public $CurrentUnixTimePoke = 0;/* 當前緩衝的 Unix 時間戳記 */ public $NextUnixTimePoke = 0; /* 下一次緩衝的 Unix 時間戳記 */ public $UnixNowToNext = 0; /* 現在和下一次緩衝相差的 Unix 時間戳記 */ public $LastTimePoke = 0; /* 上一次緩衝的時間 */ public $CurrentTimePoke = 0;/* 當前緩衝的時間 */ public $NextTimePoke = 0; /* 下一次緩衝的時間 */ public $DataLength = 0; /* 緩衝區內容長度 */ public $CacheToPage = ’’; /* 快取檔案內容 */ private $SplitTeam = false; /* 是否分組存放Cache檔案 */ public $Cache = false; /* 是否需要緩衝，使用者外界判斷 */ private $_IsCache = false; /* 是否能夠緩衝 */ public function Cache($SetTimeOut = 20,$CacheDir = ’Cache’,$SplitTeam = false,$SetExt = ’.cache’) { $this->CacheDir = $CacheDir; $this->SplitTeam = $SplitTeam; if(!is_numeric($SetTimeOut)) { $this->ErrResponse(’緩衝到期時間設定無效’); return false; } else { $this->SetTimeOut = $SetTimeOut; } $this->SetExt = $SetExt; /* 緩衝開始 */ 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 . $_CacheConfigDir . $_CacheFile; $_CacheConfigUrl = $this->CacheDir . $_CacheConfigDir . $_CacheConfig; } else { $_CacheUrl = $this->CacheDir . $_CacheFile; $_CacheConfigUrl = $this->CacheDir . $_CacheConfig; } if(!file_exists($_CacheUrl)) { $hanld = @fopen($_CacheUrl,"w"); @fclose($hanld); } if(!file_exists($_CacheConfigUrl)) { $hanld = @fopen($_CacheConfigUrl,"w"); @fclose($hanld); } $this->CacheConfigFile = $_CacheConfigUrl; $this->CacheFileUrl = $_CacheUrl; $this->CheckCache(); return true; } private function CheckCache() { $_FileEditTime = @filemtime($this->CacheFileUrl); $_TimeOut = $this->SetTimeOut; $_IsTimeOut = $_FileEditTime $_TimeOut; $this->LastUnixTimePoke = $_FileEditTime; $this->NextUnixTimePoke = $_IsTimeOut; $this->CurrentUnixTimePoke = time(); $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 = "上次緩衝時間戳記: $this->LastUnixTimePoke "; $_TxtInformation .= "當前緩衝時間戳記: $this->CurrentUnixTimePoke "; $_TxtInformation .= "下次緩衝時間戳記: $this->NextUnixTimePoke "; $_TxtInformation .= "上次緩衝時間: $this->LastTimePoke "; $_TxtInformation .= "當前緩衝時間: $this->CurrentTimePoke "; $_TxtInformation .= "下次緩衝時間: $this->NextTimePoke "; $_TxtInformation .= "距離下次緩衝戳: $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); if(!$_PutData) { $this->ErrResponse(’無法更改當前快取檔案內容’); return false; } else { @fclose($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白 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; } } ?> 複製代碼

