would like to mirror my iPhone or iPad to my Samsung tv

Does your Samsung TV natively support AirPlay? If so, you can wirelessly mirror your iPad screen to your TV:

Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch - Apple Support

Otherwise, you can connect your iPhone/iPad using an appropriate adapter and HDMI cable. Your iPhone - and potentially your iPad - will have a Lightning connector. You simply need an Apple Lightning to USB 3 Camera Adapter and a good quality HDMI cable:

https://store.apple.com/uk/xc/product/MK0W2ZM/A

If you have a recent iPad with a USB-C connector, there are many third-party Adapters - or you can use a Apple USB-C Digital AV Multiport Adapter:

https://store.apple.com/uk/xc/product/MUF82ZM/A