redirect parameters

Hello. I want the links that are in this format: example.com/?mehdi=12345 to be redirected to this format: example.com/?reza=12345

This means wherever the parameter “mehdi” exists, it should be changed to the parameter “reza”. Please note that the number 12345 is variable, meaning it could be any number. Also, it’s possible that this link has additional parameters. For example, it could be in this format: example.com/?mehdi=12345&source=ghjk I just want wherever the parameter “mehdi” exists to be changed to the parameter “reza”.