how to install php5.5 in ubuntu 17.10

I have few projects which are developed on php5.5.9. So I am trying to install php5.5.9 in ubuntu 17.10 but it is showing error.

I have used the below command:

sudo apt-get install php5.5

It's showing the following error:

E: Unable to locate package php5.5E: Couldn't find any package byglob 'php5.5' E: Couldn't find any package by regex 'php5.5'

Could you please help me.