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PHP通過文件存儲來實現(xiàn)緩存
Home Backend Development PHP Tutorial PHP透過文件存儲來實現(xiàn)緩存

PHP透過文件存儲來實現(xiàn)緩存

Jun 13, 2016 pm 12:17 PM
nbsp php smarty

PHP通過文件存儲來實現(xiàn)緩存

PHP通過文件存儲來實現(xiàn)緩存

在一些數(shù)據(jù)庫數(shù)據(jù)記錄較大,但是服務(wù)器有限的時候,可能一條MySQL查詢就會好幾百毫秒,一個簡單的頁面一般也有十幾條查詢,這個時候也個頁面加載下來基本要好幾秒了,如果并發(fā)量高的話服務(wù)器基本就癱瘓了,造成一個頁面很久也加載不下來,這個時候我們可以使用文件緩存來緩解下MySQL的壓力,下面給個使用例子。?

[php]?view plaincopy
  1. ??
  2. //頁面業(yè)務(wù)邏輯處理,獲得結(jié)果??
  3. $objPage?=?new?Page_IndexModel($arrParams);??
  4. ??
  5. //一系列的業(yè)務(wù)邏輯放在了objPage中,調(diào)用process方法獲得結(jié)果集??
  6. $arrResult?=?$objPage->process();??
  7. ??
  8. //獲得結(jié)果后smarty賦值??
  9. $smarty->assign($arrResult);??
  10. ??
  11. //輸出模板??
  12. $smarty->display();??
  13. ??
  14. ?>??


現(xiàn)在我們用文件緩存來略過Page業(yè)務(wù)處理這一步?
[php]?view plaincopy
  1. ??
  2. $cachFile?=?'./index.php';??
  3. //緩存文件存在且時間不超過一小時,則直接使用緩存的結(jié)果集,不在進行任何的MySQL查詢了??
  4. if(file_exists($cacheFile)?&&?time()-filemtime($cachFile)?
  5. ???//使用緩存中的結(jié)果??
  6. ???$arrResult?=?include($cachFile);??
  7. }?else?{??
  8. ???$objPage?=?new?Page_IndexModel($arrParams);??
  9. ???$arrResult?=?$objPage->process();??
  10. ???$strContent?=?".var_export($arrResult,?true)."\n;";??
  11. ?????
  12. ???//將結(jié)果集緩存??
  13. ???file_put_contents($cachFile,?$strContent);??
  14. }??
  15. ??
  16. //獲得結(jié)果后smarty賦值??
  17. $smarty->assign($arrResult);??
  18. ??
  19. //輸出模板??
  20. $smarty->display();??


參考來源:?
PHP通過文件存儲來實現(xiàn)緩存
http://www.lai18.com/content/407149.html

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