数据库中的数据存储和检索

Question

在PHP中使用表格时，我们输入的详细信息必须存储在数据库中...就像数据使用任何编码方案存储在数据库中一样... bcoz，当我使用除英语之外的其他语言时，存储显示DB中有些荒谬的代码...但是当我检索数据时，它就像我用标准英语所迷一样...

Answer 1

You need to check the font encoding in the database. The same goes for the html .You should also reed the php manulal on encoding og deconding php strings

Answer 2

I think by 'language' you actually mean 'character encoding' . Please go ahead and read The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) . It will save you (and others ;) a lot of trouble in the future.

The basic thing is that you have to know the encoding of your characters at every stage of your processing and storage , because otherwise, you can not really ensure proper, readable output.

That your setup is working right now is more or less a lucky incident, but as soon as you use your database from a different app (or change the way your current app deals with strings), things can break down pretty fast.

You want to ensure that all characters in your database are stored with the same encoding (preferably one of the UNICODE versions), so that you can convert them reliably to any other encoding you might need in your apps.

Answer 3

Working with different character sets can get a bit tricky at times, especially when juggling data between the application and data layers. There are plenty of tutorials / blog posts to be found on the web - a quick google for "PHP MySQL UTF data" brings up a fair few results. But in summary:

PHP

PHP doesn't have native very good Unicode support yet : it's far better to utilise a third-part extension, of which MBString is the best.

MySQL

You need to make sure your tables/columns are correctly setup to support UTF character data. This is just a matter of creating/altering the columns in question to use a UTF character set:

ALTER TABLE theTabel MODIFY formTextField VARCHAR(255) CHARACTER SET utf8

HTML

Finally, you need to make sure your HTML is being served with the correct headers

Content-type: text/html; charset=utf-8