Update release notes.
php: Fix comment in run-php-tests.sh.

This updates commit cd40cf713991569e51b42742177e57f3dca148bc.
php: Work around buggy PHP returning array as long.

Because OStringList is an optarg, we must specify "a!"  to
zend_parse_parameters.

However zend_parse_parameters still returns this as a *long* rather
than a NULL (or empty array) so positively check that it has returned
an array.