generate Unicode characters as you want

generateUnicodeCharacters.vim

function! GenerateUnicode(first, last)
  let i = a:first
  while i <= a:last
    " you can change the format, here \'%04X\' => \' is used to output the value and make it avaiable for php.
    let c = printf("\'%04X\' => \'", i)
    for j in range(16)
      let c = c . nr2char(i) 
      let i += 1
    endfor
    " also, append \', to the end of line, to make it php compatable.
    let d = printf("\'%s", ",")
    let c = c . d
    $put = c 
  endwhile
endfunction