:sig
String mysql_error(MySQL* m)

:params
m : pointer to a MySQL connection struct
return value : MySQL error message (if present, otherwise empty string)

:see
>mysql

:content
Returns the last error message associated with the given MySQL connection.

If there is no current error, the result is an empty string.

Related:

- PHP: modern database access through `mysqli_*` or PDO methods rather than the old `mysql_*` family
- JavaScript / Node.js: clients such as `mysql2`, query builders, or ORM adapters
