希腊字符无法正确显示到数据库/从数据库正确显示-html，php，mysqli

Question

My database has collation utf8-general-ci [I also tried greek-general-ci with worse results].

When I insert a row with Greek values directly through phpMyAdmin, it appears on my html page like this: '??????'.

When I insert a row through my html form, it appears correctly on the html-outcome page, but on phpMyAdmin it looks like this: 'ΜαÏία'.

I can deal with that, since I'm only doing this for a university project, so I can just insert all rows through my html form, but I'm really curious why this is happening.

On my html files I have <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> and when I had header('Content-Type: text/html; charset=utf-8'); on my php files it messed seriously with my pages so I must not include it. Also tried including $mysqli->set_charset("utf8"); but only errors appeared.

I have also checked Greek characters encoding works in HTML but not in PHP but we don't have the same problem. Should I change the httpd.conf file however?

Answer 1

First of all check your table's collation. It's not linked to database collation. Your table collation should be utf8-general-ci too.

<? header('Content-Type: text/html; charset=utf-8'); 
$mysqli->set_charset("utf8"); ?>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">

When all these four settings are active; You should able to insert, update or read UTF-8 INSERTED data successfully

My guess is your problem occured because your old data is not utf-8 encoded. You should create a batch script;

1. which selects all data from table
2. convert it to utf-8 using mb_convert_encoding
3. and updated old data

to fix your data.