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php官网一段留言
IMPORTANT! just a note: weird behaviour when doing an exec on a sqlite db!!! if want to execute a query on a sqlite db with exec, and your dbfile already was e.g. mode 777, and you get some php errors saying "SQLite3::exec(): unable to open database file in ...." and you get crazy while debugging, just add write üermissions to the whole directory for the user the webserver/php runs. this behaviour makes absolutely NO sense, and is a source of frustration. at least a more meaningful errormessage would be nice. i couldnt figure out why sqlite needs write permissions for the whole dir instead of only one file. this is stupid and must be a bug! (to be secure you have to create a directory with write permissions only for php/apache)
大意是：把数据库放到一个另外文件夹（不影响其他文件），设置读写权限
纠结的是：数据库和数据库所在的文件夹都要可写（可能是因为写数据库时，需要建立一个临时文件）
具体用到就是 chmod
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原文地址：http://www.cnblogs.com/d20062303732/p/4379708.html
