/usr/ports/lang/php72 # make install clean

===>  php72-7.2.0_1 conflicts with installed package(s):
      php70-7.0.26_1
      php70-bcmath-7.0.26_1
      php70-bz2-7.0.26_1
<...>
      php70-zip-7.0.26_1
      php70-zlib-7.0.26_1

      They install files into the same place.
      You may want to stop build with Ctrl + C.