mysqli_sql_exception No such file or directory

i found the Solution
codeigniter 4 don't working with xampp apache and mysql
but when i installed apache2 and mysql without xampp
everythings are worked successfully

I was also facing same issue and try different trick to fix but not working. You can believe there is very easy solution to solve this which i've applied. You just need to change host 'localhost' to '127.0.0.1' and go ahead.