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;    zend_ast *ast;} zvalue_value;struct _zval_struct {    /* Variable information */    zvalue_value value;     /* value */    zend_uint refcount__gc;    zend_uchar type;    /* active type */    zend_uchar is_ref__gc;};