php - What happens when this happens in CI framework?

Question

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我想大声告诉你 · Answer

Aren’t the reasons for the errors all embarrassing?

No database selected

There should be a problem with the configuration of the database connection, which database is not specified

高洛峰 · Answer

Database configuration problem, check if the relevant configuration in database.php under config is correct?

扔个三星炸死你 · Answer

Not connected to the database