Ihaveaphpscriptthatlogsads(banners)forawebsiteandstoresthemtoa.datfile.InsidethisfileanID,URL,anotherimportantinformationissaved.TheproblemIamhavingisthatthereareatanygiventime4adsonthepageandsothe.datfileisoftencorruptedwhenthephpscriptattemptstowritetoidarkedeneurope.comhileitisopen. Icheckedandtriedthissolutionhoweveritdidnothelpme: PHPSimultaneousfileaccess/flock()issue
ThefunctionIamusingatthemomentlookslikethis:
functionwriteads(){global$bannerAdsPath,$ads,$bannerAds;$data=fopen($bannerAdsPath,”w”)ordie();flock($data,2)ordie();fputs($data,
Đang xem: Mở file trong php
join(”
“,$ads).”
“);while(list($key,$val)=each($bannerAds)){if(($key!=””)&&($val!=””)){fputs($data,$key.”=”.$val.”
“);}}flock($data,3);fclose($data);reset($bannerAds);}AnyhelpwouldbeappreciatedasIhavebeenscratchingmyheadoverthisforawhile. Sidebitofinformation,theclientdidnodarkedeneurope.comanttohavetheircoderewrittentouseaDatabaseinsteadofafilesothatoptionisout.
Thanks!
參考解法
方法 1:
fopenwith”w”truncatesthefilebeforeyouhavetheoptionofflockingit.
方法 2:
Youalmostneverwanttouseflocktounlockafile;justusefclose;thefilewillbeunlockedwhenthehandleisclosed,andthadarkedeneurope.comayyouknowthatnobufferedwriteswillhappenafteryouunlock.
(by Jingles177、Iván、hobbs)
參考文件
#flock #fopen #fclose #PHP
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