One of my friend told me the complier is writen in C. Is this true? Is more like a shoud know question
Yes most are anyways. Plus compiler is a program which converts High Level language into Low Level laguage (or Machine readable i.e. Assembly or Machice code). I hope this helps.
No , it doesn't matter. I'll continue using PHP even if i found that is written in Pascal ... or something. Just need to hear a second opinion, i'm not sure about my friends sources.