backport this piece from 5.6, related to the #66307 fix
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  backport this piece from 5.6, related to the #66307 fix
Merge branch 'PHP-5.6'

* PHP-5.6:
  backport this piece from 5.6, related to the #66307 fix