When I uncomment extension_dir setting in php.ini, if I use the following settings, then Apache server won’t start:

entension_dir = "ext"
extension_dir = "G:Program FilesPHPext"
entension_dir = ".ext"
entension_dir = "....PHPext"

If I use the following setting, the Apache server can start

extension_dir = "G:Program FilesPHPext"

Of cause in the second situation, the extension modules cannot be loaded.

Can you figure out what the problem is?

Thank you!

I expect to solve the problem, let the right be the right.