web.config

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

  <system.webServer>
    <handlers>
      <add name="PhpHandler" path="*.php" verb="*"
           type="Peachpie.RequestHandler.RequestHandler, Peachpie.RequestHandler" preCondition="integratedMode" />
    </handlers>
    <defaultDocument>
      <files>
        <clear />
        <add value="index.php" />
      </files>
    </defaultDocument>
  </system.webServer>

  <!-- ASP.NET configuration -->
  <system.web>
    <httpRuntime requestValidationMode="2.0" requestPathInvalidCharacters="" />
    <pages validateRequest="false" />
    <globalization requestEncoding="UTF-8" responseEncoding="UTF-8" fileEncoding="" />
    <customErrors mode="Off" />
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <probing privatePath="bin/net46" />
    </assemblyBinding>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <bindingRedirect oldVersion="1.0.0.0-1.2.1.0" newVersion="1.2.1.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>