I installed PHP with Microsoft web platform installer. It's showing up in the IIS php manager.
- Click the Handler Mappings at server level and remove all items which path is
*.php.
- Choose the site which you deploy php application. At site level, click the Handler Mapping and click the
Revert To Parent.
- Click the php manager at server level and register new php version.
IIS only supports versions of php which can be download from Web Platform Installer. Please download php from Web Platform Installer, not download it from site manually.