The difference of default charset when connect to mysql with php
When the monitors the product if use codeigniter,fuelphp that PHP framework by New Relic, execute query SET NAMES foo when every connect to mysql.
This is not just problem, but execute when every connect and it was somehow eyesore, so I fix to don’t execute that query.
the code execute query SET NAMES foo
The case of codeigniter * mysqli, it is execute this code↓
This product use UTF-8 charset, and configure my.cnf too.
So I thought in the first place, this is not need it. comment out set_charset() for now. Then, don’t execute SET NAMES foo and don’t garbled.
Only one environment garbled characters
It' OK. just as planned. I apply other environment this fixing. one environment garbled characters. it seemed garbled by latin1.
There is difference in default charset by mysql library
The result i investigated, There is difference in default charset by mysql library.
MySQL :: MySQL PHP API :: 2.4 Choosing a library
PHP: Choosing a library - Manual
| library | default charset |
|---|---|
| mysqlnd | the server default charset |
| libmysql | charset selected when build(latin1 if no selected) |
Finally, the cause of garbled is the server is used libmysql.
How to fix,
- use mysqlnd
- rebuild libmysql and select charset
- select charset by mysqli_options (selectable charset without
SET NAMES foo) PHP: mysqli::options - Manual
This is a minute thing, but it would be better a few query!
