how to link a font family to html code example

Example 1: import font css

@font-face {
  font-family: "Open Sans";
  src: url("/fonts/OpenSans-Regular-webfont.woff2") format("woff2"),
       url("/fonts/OpenSans-Regular-webfont.woff") format("woff");
}

Example 2: using custom fonts in php

@font-face {font-family: "My Custom Font"; src: url('../fonts/gurbaniwebthick.ttf') ;}