'Don\'t support backends with the PHP runtime.
This should be used to prevent use of backends update/start/configure
with the PHP runtime.  We continue to allow backends
stop/delete/list/rollback just in case there are existing PHP backends.
Args:
appyaml: A parsed app.yaml file.'

def BackendsPhpCheck(self, appyaml):

    if appyaml.runtime.startswith('php'):
        _PrintErrorAndExit(self.error_fh, 'Error:    Backends    are    not    supported    with    the    PHP    runtime.    Please    use    Modules    instead.\n')
