Database Error
SQLSTATE[HY000][1043] Unknown database 'my_database'
What This Error Means
This error occurs when the database connection is established successfully, but the database specified in the connection string does not exist or has been renamed.
Why It Happens
This error typically happens when there's a mismatch between the database name specified in the connection parameters and the actual database name in the MySQL server. It could be due to a typo in the database name, or the database has been dropped or renamed.
How to Fix It
- 1To resolve this issue, you need to check the database name specified in the connection string and verify that it matches the actual database name in the MySQL server. Here are the steps to follow:
- 21. Review the PHP code that connects to the database and verify that the database name is correct.
- 32. Check the MySQL server for the actual database name using the following SQL command: `SHOW DATABASES;`
- 43. If the database name is incorrect, update the connection string with the correct database name.
- 54. Re-run the SQL query to establish a new connection to the database.
Example Code Solution
❌ Before (problematic code)
SQL
$dsn = 'mysql:host=localhost;dbname=my_database';✅ After (fixed code)
SQL
$dsn = 'mysql:host=localhost;dbname=my_actual_database';Fix for SQLSTATE[HY000][1043] Unknown database 'my_database'
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