MAKE_STD_ZVAL() is gone in PHP 7.

zval allocation macros ALLOC_ZVAL, ALLOC_INIT_ZVAL, MAKE_STD_ZVAL are removed. In most cases their usage indicate that zval* need to be changed into plain zval. Macro INIT_PZVAL is removed as well and its usages in most cases should be just removed.

Furthermore, using zvals in php_phongo.c is problematic anyway:

PHPNG doesn't require any involvement of pointers to pointers to zval. Most occurrences of zval** variables and parameters have to be changed into zval*. The corresponding Z_PP() macros that work with such variables should be changed into Z_P().

Most of these instances should have already been converted to bson_t, as thats how it will eventually wind up as anyway.