typedef union _zvalue_value {
        long lval;                       /* long value */
        double dval;                     /* double value */
        struct {
                char *val;
                int len;
        } str;
        HashTable *ht;                   /* hash table value */
        zend_object_value obj;
} zvalue_value;

struct _zval_struct {
        /* Variable information */
        zvalue_value value;      /* value */
        zend_uint refcount;
        zend_uchar type;         /* active type */
        zend_uchar is_ref;
};