Hi, I have a problem

I'm beginner and don't know how to quickly check and retrieve data like in Arrays.

I want to store names, and some options for 27 items and f.e. in PHP the best way to do this was an Array, but here don't know how to this.
I have the possibility to predefine them or to check data online by JSON, but the problem is the data have not any id:
[{"dmgMult":1,"name":"item1","dmgReq":0},{"dmgMult":1.1,"name":"item2","dmgReq":100},{"dmgMult":1.2,"name":"item3","dmgReq":250}]

I want to find a "dmgMult" value for "name" I specify. How can I do this? I want to find the easiest (quickest) way
Thanks for answer