SELECT from slave and INSERT into master in MySQL I'm using PHP/Laravel and MySQL databases.
Briefly, I want to use slave databases for reads and master database for writes.
What Laravel config, Laravel package, or database tool do you suggest to handle my issue?
Dangerous. Read about "Critical Read". If you blindly send all SELECTs to a Slave, you could screw up transactions on the master. Or you could miss data when replication is "behind".

Instead, modify your application to connect to either the Master or to some Slave, based on whether it is safe to get the data just from a Slave.