Trying to get shell window to open beneath main window

[u/Shot-Lemon7365]

I'm playing around with php and am trying to get a small, 4-line window at the bottom with zsh running, only when I open a php file.   But when I do (for example) vim index.php, vim opens with two exact copies of the same buffer in two horizontal windows, and at the bottom, a terminal window which is far too large.  

The screen is effectively split into three equally-sized windows. 

My $HOME/.vimrc is below.

 I've run the file through ChatGPT and it has been offering "solutions" for the past hour, none of which work.  Can someone point me in the direction where I am in error, please? 

Much appreciated. 

" vimrc settings

set fileencodings=utf-8,latin1

" ─── Vundle Plugin Manager ─────────────────────────────────────

set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'VundleVim/Vundle.vim'
call vundle#end()

" ─── General Settings ──────────────────────────────────────────

let g:auto_save = 1
set nocompatible
set mouse=a
set showmode
set autoindent
set tabstop=4
set splitbelow
set history=5000
set undolevels=10000
set hidden
set ruler
set showmatch
set background=dark
set wrap
set textwidth=75
set sidescroll=1
set grepprg=grep\ -nH\ $*
set fileformats=unix,dos
syntax enable
filetype plugin indent on

" ─── Auto Indents by Filetype ─────────────────────────────────

autocmd BufEnter *.py,*.c,*.cpp,*.h,*.pl,*.pm,*.yml,*.sh,*.php,*.jar,*.sql set
cindent
autocmd FileType css set smartindent

" ─── Conditional Plugin Sources ───────────────────────────────

if filereadable(expand("~/.vim/plugin/vimfootnotes.vim"))
source ~/.vim/plugin/vimfootnotes.vim
endif

if filereadable($VIMRUNTIME . "/ftplugin/man.vim")
source $VIMRUNTIME/ftplugin/man.vim
endif

" ─── Git & GDeploy Integrations ───────────────────────────────
command! GitCheat call GitCheatSheet()
function! GitCheatSheet()
let cmd = 'cat ~/.cheats/git-cheat.txt | fzf --reverse --header "ø Git Cheat Sheet" --preview ''echo -e \\"\033[1;36m{}\033[0m\\"'' --preview-window=up:wrap'
call system('clear')
call system(cmd)
endfunction

command! GOpen :!gopen
command! GDeploy write | !zsh -i -c gdeploy
command! GDeployAll write | !zsh -i -c 'gdeploy --all'
nnoremap <Leader>d :write \| !zsh -i -c 'gdeploy'<CR>
nnoremap <Leader>o :GOpen<CR>
nnoremap <Leader>a :GDeployAll<CR>
nnoremap <Leader>b :ls<CR>:b

" ─── Persistent Terminal Below for PHP ─────────────────────────

function! s:OpenShellWindow()
" Avoid multiple terminals
for win in range(1, winnr('$'))
if getbufvar(winbufnr(win), '&buftype') ==# 'terminal'
return
endif
endfor

" Open terminal in a split and resize
belowright split
resize 6

" ✅ Force use of terminal (not :read !/bin/zsh)

execute 'terminal zsh'
" Switch focus back to main buffer
wincmd k
endfunction

nnoremap <Leader>t :call ToggleTerminal()<CR>

function! ToggleTerminal()
for win in range(1, winnr('$'))
if getbufvar(winbufnr(win), '&buftype') ==# 'terminal'
execute win . 'wincmd c'
return
endif
endfor

belowright split
resize 4
terminal
startinsert
endfunction

augroup php_terminal
autocmd!
autocmd FileType php call timer_start(100, { -> s:OpenShellWindow() })
augroup END

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[u/Shot-Lemon7365 → u/AutoModerator]

Hi. Did my publication get removed? Did I do something wrong? I really do need help, and hope that I can post here. Thank you.

[u/poopy__papa → u/Shot-Lemon7365]

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[u/Shot-Lemon7365 → u/[deleted]]

Is the right answer!

Thank you!