7.7.5.4 删除元素
//删除key
ZEND_API int ZEND_FASTCALL zend_hash_del(HashTable *ht, zend_string *key);
//与zend_hash_del()类似，不同地方是如果元素类型为indirect则同时销毁indirect的值
ZEND_API int ZEND_FASTCALL zend_hash_del_ind(HashTable *ht, zend_string *key);
ZEND_API int ZEND_FASTCALL zend_hash_str_del(HashTable *ht, const char *key, size_t len);
ZEND_API int ZEND_FASTCALL zend_hash_str_del_ind(HashTable *ht, const char *key, size_t len);
ZEND_API int ZEND_FASTCALL zend_hash_index_del(HashTable *ht, zend_ulong h);
ZEND_API void ZEND_FASTCALL zend_hash_del_bucket(HashTable *ht, Bucket *p);
