Include PHP 5.6

Signed-off-by: crynobone <crynobone@gmail.com>
Include PHP 5.6

Signed-off-by: crynobone <crynobone@gmail.com>
Tweak command order, noticing `zend_mm_heap` issue on certain environment.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2
Merge branch '2.2'