How can I grep parameter from plugins Joomla?

I write a plugin joomla and I need to pass some parameters as {myPlugin start= “D02/02/2021″ end=”F02/02/2025” }some text{/myPlugin}.
I want to use regex to grep params but I am not an expert for regex. I have began here my work for extracting all values but I can’t get all I want. I want to get

1. All the values params,
2. Each content of the tag (here : some text)
   Can I have some help ?

Thanks

I have tried to write some regex