diff --git a/init.lua b/init.lua
index 0d7eda1..d661f7a 100644
--- a/init.lua
+++ b/init.lua
@@ -1,4 +1,5 @@
 require("core.options")
+require("core.functions")
 require("core.keymaps")
 require("core.plugins")
 require("core.aliases")
diff --git a/lua/core/functions.lua b/lua/core/functions.lua
new file mode 100644
index 0000000..8ec1fb4
--- /dev/null
+++ b/lua/core/functions.lua
@@ -0,0 +1,17 @@
+-- add debug print backtrace on cursor
+-- function backtrace()
+--    local pos = vim.api.nvim_win_get_cursor(0)[2]
+--    local line = vim.api.nvim_get_current_line()
+--    local nline = line:sub(0, pos) .. 'debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)' .. line:sub(pos + 1)
+--    vim.api.nvim_set_current_line(nline)
+-- end
+--vim.api.nvim_create_user_command('backtrace', 'echo "debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)"', {'bang': v:true})
+--
+local PHP = {}
+
+PHP.backtrace = function()
+    local pos = vim.api.nvim_win_get_cursor(0)[2]
+    local line = vim.api.nvim_get_current_line()
+    local nline = line:sub(0, pos) .. 'debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)' .. line:sub(pos + 1)
+    vim.api.nvim_set_current_line(nline)
+end
diff --git a/lua/core/plugin_config/nvim-tree.lua b/lua/core/plugin_config/nvim-tree.lua
index eeb97a0..b48cd7f 100644
--- a/lua/core/plugin_config/nvim-tree.lua
+++ b/lua/core/plugin_config/nvim-tree.lua
@@ -4,3 +4,4 @@ vim.g.loaded_netrwPlugin = 1
 require("nvim-tree").setup()
 
 vim.keymap.set('n', '<c-n>', ':NvimTreeFindFileToggle<CR>')
+--vim.keymap.set("n", "I", nvim-tree-api.tree.toggle_gitignore_filter(), opts("Toggle Git Ignore"))