[php-src] 窥探Php内核中的数组与面向对象
内容均以php5.6.14为例.
扩展中定义一个类有以下四步：
#1. 声明一个存储类信息的指针. zend_class_entry *errs_ce; #2. 定义方法的参数信息，类的方法实现. ZEND_BEGIN_ARG_INFO_EX(errs_test_arginfo, 0, 0, 1) ZEND_ARG_INFO(0, arg) ZEND_END_ARG_INFO() PHP_METHOD(errs, test) { } #3. 声明一个含有类方法信息的数组; 统一用含有三个NULL的数组结尾. zend_function_entry errs_methods[] = { PHP_ME(errs, test, errs_test_arginfo, ZEND_ACC_PUBLIC) {NULL, NULL, NULL} }; /* 注意 errs_methods 结尾要加分号。 */ #4. 模块初始化 MINIT 中注册. PHP_MINIT_FUNCTION(testmodule) { zend_class_entry ce;
/* init class entry */ INIT_CLASS_ENTRY(ce, "errs", errs_methods);
/* register */ errs_ce = zend_register_internal_class(&ce TSRMLS_CC);
/* flags */ errs_ce->ce_flags |= ZEND_ACC_FINAL_CLASS; return SUCCESS; }
zend_class_entry 是实现PHP类和对象的基础结构类型。
./Zend/zend.h:302
/* * zval */ typedef struct _zend_class_entry zend_class_entry; .... struct _zend_class_entry { char type; const char *name; zend_uint name_length; struct _zend_class_entry *parent; int refcount; zend_uint ce_flags; HashTable function_table; HashTable properties_info; zval **default_properties_table; zval **default_static_members_table; zval **static_members_table; HashTable constants_table; int default_properties_count; int default_static_members_count; union _zend_function *constructor; union _zend_function *destructor; union _zend_function *clone; union _zend_function *__get; union _zend_function *__set; union _zend_function *__unset; union _zend_function *__isset; union _zend_function *__call; union _zend_function *__callstatic; union _zend_function *__tostring; union _zend_function *__debugInfo; union _zend_function *serialize_func; union _zend_function *unserialize_func; zend_class_iterator_funcs iterator_funcs; /* handlers */ zend_object_value (*create_object)(zend_class_entry *class_type TSRMLS_DC); zend_object_iterator *(*get_iterator)(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC); int (*interface_gets_implemented)(zend_class_entry *iface, zend_class_entry *class_type TSRMLS_DC); /* a class implements this interface */ union _zend_function *(*get_static_method)(zend_class_entry *ce, char* method, int method_len TSRMLS_DC); /* serializer callbacks */ int (*serialize)(zval *object, unsigned char **buffer, zend_uint *buf_len, zend_serialize_data *data TSRMLS_DC); int (*unserialize)(zval **object, zend_class_entry *ce, const unsigned char *buf, zend_uint buf_len, zend_unserialize_data *data TSRMLS_DC); zend_class_entry **interfaces; zend_uint num_interfaces; zend_class_entry **traits; zend_uint num_traits; zend_trait_alias **trait_aliases; zend_trait_precedence **trait_precedences; union { struct { const char *filename; zend_uint line_start; zend_uint line_end; const char *doc_comment; zend_uint doc_comment_len; } user; struct { const struct _zend_function_entry *builtin_functions; struct _zend_module_entry *module; } internal; } info; };
定义参数信息的宏。
./Zend/zend_API.h:108
#define ZEND_ARG_INFO(pass_by_ref, name) { #name, sizeof(#name)-1, NULL, 0, 0, pass_by_ref, 0, 0 },
... #define ZEND_BEGIN_ARG_INFO_EX(name, _unused, return_reference, required_num_args) \ static const zend_arg_info name[] = { \ { NULL, 0, NULL, required_num_args, 0, return_reference, 0, 0 }, #define ZEND_BEGIN_ARG_INFO(name, _unused) \ ZEND_BEGIN_ARG_INFO_EX(name, 0, ZEND_RETURN_VALUE, -1) #define ZEND_END_ARG_INFO() };
ZEND_BEGIN_ARG_INFO_EX() 的四个参数含义：
name: 类名_方法名_arginfo
_unused: 0
return_reference: 0
required_num_args: 这个函数必要的参数数量是几个
ZEND_ARG_INFO() 的两个参数含义：
pass_by_ref: 0
name: 形参名
./Zend/zend_API.h:35
typedef struct _zend_function_entry { const char *fname; void (*handler)(INTERNAL_FUNCTION_PARAMETERS); const struct _zend_arg_info *arg_info; zend_uint num_args; zend_uint flags; } zend_function_entry;
#define INIT_CLASS_ENTRY(class_container, class_name, functions) \ INIT_OVERLOADED_CLASS_ENTRY(class_container, class_name, functions, NULL, NULL, NULL) #define INIT_CLASS_ENTRY_EX(class_container, class_name, class_name_len, functions) \ INIT_OVERLOADED_CLASS_ENTRY_EX(class_container, class_name, class_name_len, functions, NULL, NULL, NULL, NULL, NULL) #define INIT_OVERLOADED_CLASS_ENTRY_EX(class_container, class_name, class_name_len, functions, handle_fcall, handle_propget, handle_propset, handle_propunset, handle_propisset) \ { \ const char *cl_name = class_name; \ int _len = class_name_len; \ class_container.name = zend_new_interned_string(cl_name, _len+1, 0 TSRMLS_CC); \ if (class_container.name == cl_name) { \ class_container.name = zend_strndup(cl_name, _len); \ } \ class_container.name_length = _len; \ INIT_CLASS_ENTRY_INIT_METHODS(class_container, functions, handle_fcall, handle_propget, handle_propset, handle_propunset, handle_propisset) \ } .... #define INIT_OVERLOADED_CLASS_ENTRY(class_container, class_name, functions, handle_fcall, handle_propget, handle_propset) \ INIT_OVERLOADED_CLASS_ENTRY_EX(class_container, class_name, sizeof(class_name)-1, functions, handle_fcall, handle_propget, handle_propset, NULL, NULL)
类的定义，接口定义，属性操作，数组操作的函数原型。
./Zend/zend_API.h: 268~457
.... ZEND_API int zend_register_functions(zend_class_entry *scope, const zend_function_entry *functions, HashTable *function_table, int type TSRMLS_DC); ZEND_API void zend_unregister_functions(const zend_function_entry *functions, int count, HashTable *function_table TSRMLS_DC); ZEND_API int zend_startup_module(zend_module_entry *module_entry); ZEND_API zend_module_entry* zend_register_internal_module(zend_module_entry *module_entry TSRMLS_DC); ZEND_API zend_module_entry* zend_register_module_ex(zend_module_entry *module TSRMLS_DC); ZEND_API int zend_startup_module_ex(zend_module_entry *module TSRMLS_DC); ZEND_API int zend_startup_modules(TSRMLS_D); ZEND_API void zend_collect_module_handlers(TSRMLS_D); ZEND_API void zend_destroy_modules(void); ZEND_API void zend_check_magic_method_implementation(const zend_class_entry *ce, const zend_function *fptr, int error_type TSRMLS_DC); // 注册一个"类" ZEND_API zend_class_entry *zend_register_internal_class(zend_class_entry *class_entry TSRMLS_DC);
// 注册一个"子类"；第二个，第三个参数都为 NULL 时，等同于 zend_register_internal_class. ZEND_API zend_class_entry *zend_register_internal_class_ex(zend_class_entry *class_entry, zend_class_entry *parent_ce, char *parent_name TSRMLS_DC);
// 注册一个"接口" ZEND_API zend_class_entry *zend_register_internal_interface(zend_class_entry *orig_class_entry TSRMLS_DC); ZEND_API void zend_class_implements(zend_class_entry *class_entry TSRMLS_DC, int num_interfaces, ...); ZEND_API int zend_register_class_alias_ex(const char *name, int name_len, zend_class_entry *ce TSRMLS_DC); #define zend_register_class_alias(name, ce) \ zend_register_class_alias_ex(name, sizeof(name)-1, ce TSRMLS_CC) #define zend_register_ns_class_alias(ns, name, ce) \ zend_register_class_alias_ex(ZEND_NS_NAME(ns, name), sizeof(ZEND_NS_NAME(ns, name))-1, ce TSRMLS_CC) ZEND_API int zend_disable_function(char *function_name, uint function_name_length TSRMLS_DC); ZEND_API int zend_disable_class(char *class_name, uint class_name_length TSRMLS_DC); ZEND_API void zend_wrong_param_count(TSRMLS_D); #define IS_CALLABLE_CHECK_SYNTAX_ONLY (1<<0) #define IS_CALLABLE_CHECK_NO_ACCESS (1<<1) #define IS_CALLABLE_CHECK_IS_STATIC (1<<2) #define IS_CALLABLE_CHECK_SILENT (1<<3) #define IS_CALLABLE_STRICT (IS_CALLABLE_CHECK_IS_STATIC) ZEND_API zend_bool zend_is_callable_ex(zval *callable, zval *object_ptr, uint check_flags, char **callable_name, int *callable_name_len, zend_fcall_info_cache *fcc, char **error TSRMLS_DC); ZEND_API zend_bool zend_is_callable(zval *callable, uint check_flags, char **callable_name TSRMLS_DC); ZEND_API zend_bool zend_make_callable(zval *callable, char **callable_name TSRMLS_DC); ZEND_API const char *zend_get_module_version(const char *module_name); ZEND_API int zend_get_module_started(const char *module_name); ZEND_API int zend_declare_property(zend_class_entry *ce, const char *name, int name_length, zval *property, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_ex(zend_class_entry *ce, const char *name, int name_length, zval *property, int access_type, const char *doc_comment, int doc_comment_len TSRMLS_DC);
// 定义类属性，zend_declare_property_* ZEND_API int zend_declare_property_null(zend_class_entry *ce, const char *name, int name_length, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_bool(zend_class_entry *ce, const char *name, int name_length, long value, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_long(zend_class_entry *ce, const char *name, int name_length, long value, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_double(zend_class_entry *ce, const char *name, int name_length, double value, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_string(zend_class_entry *ce, const char *name, int name_length, const char *value, int access_type TSRMLS_DC); ZEND_API int zend_declare_property_stringl(zend_class_entry *ce, const char *name, int name_length, const char *value, int value_len, int access_type TSRMLS_DC); // 定义类常量，zend_declare_class_constant_* ZEND_API int zend_declare_class_constant(zend_class_entry *ce, const char *name, size_t name_length, zval *value TSRMLS_DC); ZEND_API int zend_declare_class_constant_null(zend_class_entry *ce, const char *name, size_t name_length TSRMLS_DC); ZEND_API int zend_declare_class_constant_long(zend_class_entry *ce, const char *name, size_t name_length, long value TSRMLS_DC); ZEND_API int zend_declare_class_constant_bool(zend_class_entry *ce, const char *name, size_t name_length, zend_bool value TSRMLS_DC); ZEND_API int zend_declare_class_constant_double(zend_class_entry *ce, const char *name, size_t name_length, double value TSRMLS_DC); ZEND_API int zend_declare_class_constant_stringl(zend_class_entry *ce, const char *name, size_t name_length, const char *value, size_t value_length TSRMLS_DC); ZEND_API int zend_declare_class_constant_string(zend_class_entry *ce, const char *name, size_t name_length, const char *value TSRMLS_DC); // 更新类常量，zend_update_class_constants_* ZEND_API void zend_update_class_constants(zend_class_entry *class_type TSRMLS_DC); ZEND_API void zend_update_property(zend_class_entry *scope, zval *object, const char *name, int name_length, zval *value TSRMLS_DC); ZEND_API void zend_update_property_null(zend_class_entry *scope, zval *object, const char *name, int name_length TSRMLS_DC); ZEND_API void zend_update_property_bool(zend_class_entry *scope, zval *object, const char *name, int name_length, long value TSRMLS_DC); ZEND_API void zend_update_property_long(zend_class_entry *scope, zval *object, const char *name, int name_length, long value TSRMLS_DC); ZEND_API void zend_update_property_double(zend_class_entry *scope, zval *object, const char *name, int name_length, double value TSRMLS_DC); ZEND_API void zend_update_property_string(zend_class_entry *scope, zval *object, const char *name, int name_length, const char *value TSRMLS_DC); ZEND_API void zend_update_property_stringl(zend_class_entry *scope, zval *object, const char *name, int name_length, const char *value, int value_length TSRMLS_DC); // 更新类静态属性，zend_update_static_property_* ZEND_API int zend_update_static_property(zend_class_entry *scope, const char *name, int name_length, zval *value TSRMLS_DC); ZEND_API int zend_update_static_property_null(zend_class_entry *scope, const char *name, int name_length TSRMLS_DC); ZEND_API int zend_update_static_property_bool(zend_class_entry *scope, const char *name, int name_length, long value TSRMLS_DC); ZEND_API int zend_update_static_property_long(zend_class_entry *scope, const char *name, int name_length, long value TSRMLS_DC); ZEND_API int zend_update_static_property_double(zend_class_entry *scope, const char *name, int name_length, double value TSRMLS_DC); ZEND_API int zend_update_static_property_string(zend_class_entry *scope, const char *name, int name_length, const char *value TSRMLS_DC); ZEND_API int zend_update_static_property_stringl(zend_class_entry *scope, const char *name, int name_length, const char *value, int value_length TSRMLS_DC); // 读取类属性 ZEND_API zval *zend_read_property(zend_class_entry *scope, zval *object, const char *name, int name_length, zend_bool silent TSRMLS_DC); // 读取类静态属性，与object无关 ZEND_API zval *zend_read_static_property(zend_class_entry *scope, const char *name, int name_length, zend_bool silent TSRMLS_DC); ZEND_API zend_class_entry *zend_get_class_entry(const zval *zobject TSRMLS_DC); ZEND_API int zend_get_object_classname(const zval *object, const char **class_name, zend_uint *class_name_len TSRMLS_DC); ZEND_API char *zend_get_type_by_const(int type); #define getThis() (this_ptr) #define WRONG_PARAM_COUNT ZEND_WRONG_PARAM_COUNT() #define WRONG_PARAM_COUNT_WITH_RETVAL(ret) ZEND_WRONG_PARAM_COUNT_WITH_RETVAL(ret) #define ARG_COUNT(dummy) (ht) #define ZEND_NUM_ARGS() (ht) #define ZEND_WRONG_PARAM_COUNT() { zend_wrong_param_count(TSRMLS_C); return; } #define ZEND_WRONG_PARAM_COUNT_WITH_RETVAL(ret) { zend_wrong_param_count(TSRMLS_C); return ret; } #ifndef ZEND_WIN32 #define DLEXPORT #endif // 初始化一个数组 #define array_init(arg) _array_init((arg), 0 ZEND_FILE_LINE_CC) #define array_init_size(arg, size) _array_init((arg), (size) ZEND_FILE_LINE_CC) // 初始化一个对象 #define object_init(arg) _object_init((arg) ZEND_FILE_LINE_CC TSRMLS_CC) #define object_init_ex(arg, ce) _object_init_ex((arg), (ce) ZEND_FILE_LINE_CC TSRMLS_CC) #define object_and_properties_init(arg, ce, properties) _object_and_properties_init((arg), (ce), (properties) ZEND_FILE_LINE_CC TSRMLS_CC) ZEND_API int _array_init(zval *arg, uint size ZEND_FILE_LINE_DC); ZEND_API int _object_init(zval *arg ZEND_FILE_LINE_DC TSRMLS_DC); ZEND_API int _object_init_ex(zval *arg, zend_class_entry *ce ZEND_FILE_LINE_DC TSRMLS_DC); ZEND_API int _object_and_properties_init(zval *arg, zend_class_entry *ce, HashTable *properties ZEND_FILE_LINE_DC TSRMLS_DC); ZEND_API void object_properties_init(zend_object *object, zend_class_entry *class_type); ZEND_API void zend_merge_properties(zval *obj, HashTable *properties, int destroy_ht TSRMLS_DC); /* no longer supported */ ZEND_API int add_assoc_function(zval *arg, const char *key, void (*function_ptr)(INTERNAL_FUNCTION_PARAMETERS)); ZEND_API int add_assoc_long_ex(zval *arg, const char *key, uint key_len, long n); ZEND_API int add_assoc_null_ex(zval *arg, const char *key, uint key_len); ZEND_API int add_assoc_bool_ex(zval *arg, const char *key, uint key_len, int b); ZEND_API int add_assoc_resource_ex(zval *arg, const char *key, uint key_len, int r); ZEND_API int add_assoc_double_ex(zval *arg, const char *key, uint key_len, double d); ZEND_API int add_assoc_string_ex(zval *arg, const char *key, uint key_len, char *str, int duplicate); ZEND_API int add_assoc_stringl_ex(zval *arg, const char *key, uint key_len, char *str, uint length, int duplicate); ZEND_API int add_assoc_zval_ex(zval *arg, const char *key, uint key_len, zval *value); // 添加关联数组值，add_assoc_* #define add_assoc_long(__arg, __key, __n) add_assoc_long_ex(__arg, __key, strlen(__key)+1, __n) #define add_assoc_null(__arg, __key) add_assoc_null_ex(__arg, __key, strlen(__key) + 1) #define add_assoc_bool(__arg, __key, __b) add_assoc_bool_ex(__arg, __key, strlen(__key)+1, __b) #define add_assoc_resource(__arg, __key, __r) add_assoc_resource_ex(__arg, __key, strlen(__key)+1, __r) #define add_assoc_double(__arg, __key, __d) add_assoc_double_ex(__arg, __key, strlen(__key)+1, __d) #define add_assoc_string(__arg, __key, __str, __duplicate) add_assoc_string_ex(__arg, __key, strlen(__key)+1, __str, __duplicate) #define add_assoc_stringl(__arg, __key, __str, __length, __duplicate) add_assoc_stringl_ex(__arg, __key, strlen(__key)+1, __str, __length, __duplicate) #define add_assoc_zval(__arg, __key, __value) add_assoc_zval_ex(__arg, __key, strlen(__key)+1, __value) /* unset() functions are only suported for legacy modules and null() functions should be used */ #define add_assoc_unset(__arg, __key) add_assoc_null_ex(__arg, __key, strlen(__key) + 1) #define add_index_unset(__arg, __key) add_index_null(__arg, __key) #define add_next_index_unset(__arg) add_next_index_null(__arg) #define add_property_unset(__arg, __key) add_property_null(__arg, __key) // 添加索引数组值，add_index_* ZEND_API int add_index_long(zval *arg, ulong idx, long n); ZEND_API int add_index_null(zval *arg, ulong idx); ZEND_API int add_index_bool(zval *arg, ulong idx, int b); ZEND_API int add_index_resource(zval *arg, ulong idx, int r); ZEND_API int add_index_double(zval *arg, ulong idx, double d); ZEND_API int add_index_string(zval *arg, ulong idx, const char *str, int duplicate); ZEND_API int add_index_stringl(zval *arg, ulong idx, const char *str, uint length, int duplicate); ZEND_API int add_index_zval(zval *arg, ulong index, zval *value); // 添加索引数组值 索引自增，add_next_index_* ZEND_API int add_next_index_long(zval *arg, long n); ZEND_API int add_next_index_null(zval *arg); ZEND_API int add_next_index_bool(zval *arg, int b); ZEND_API int add_next_index_resource(zval *arg, int r); ZEND_API int add_next_index_double(zval *arg, double d); ZEND_API int add_next_index_string(zval *arg, const char *str, int duplicate); ZEND_API int add_next_index_stringl(zval *arg, const char *str, uint length, int duplicate); ZEND_API int add_next_index_zval(zval *arg, zval *value); ZEND_API int add_get_assoc_string_ex(zval *arg, const char *key, uint key_len, const char *str, void **dest, int duplicate); ZEND_API int add_get_assoc_stringl_ex(zval *arg, const char *key, uint key_len, const char *str, uint length, void **dest, int duplicate); #define add_get_assoc_string(__arg, __key, __str, __dest, __duplicate) add_get_assoc_string_ex(__arg, __key, strlen(__key)+1, __str, __dest, __duplicate) #define add_get_assoc_stringl(__arg, __key, __str, __length, __dest, __duplicate) add_get_assoc_stringl_ex(__arg, __key, strlen(__key)+1, __str, __length, __dest, __duplicate) ZEND_API int add_get_index_long(zval *arg, ulong idx, long l, void **dest); ZEND_API int add_get_index_double(zval *arg, ulong idx, double d, void **dest); ZEND_API int add_get_index_string(zval *arg, ulong idx, const char *str, void **dest, int duplicate); ZEND_API int add_get_index_stringl(zval *arg, ulong idx, const char *str, uint length, void **dest, int duplicate); ZEND_API int array_set_zval_key(HashTable *ht, zval *key, zval *value); ZEND_API int add_property_long_ex(zval *arg, const char *key, uint key_len, long l TSRMLS_DC); ZEND_API int add_property_null_ex(zval *arg, const char *key, uint key_len TSRMLS_DC); ZEND_API int add_property_bool_ex(zval *arg, const char *key, uint key_len, int b TSRMLS_DC); ZEND_API int add_property_resource_ex(zval *arg, const char *key, uint key_len, long r TSRMLS_DC); ZEND_API int add_property_double_ex(zval *arg, const char *key, uint key_len, double d TSRMLS_DC); ZEND_API int add_property_string_ex(zval *arg, const char *key, uint key_len, const char *str, int duplicate TSRMLS_DC); ZEND_API int add_property_stringl_ex(zval *arg, const char *key, uint key_len, const char *str, uint length, int duplicate TSRMLS_DC); ZEND_API int add_property_zval_ex(zval *arg, const char *key, uint key_len, zval *value TSRMLS_DC); // 添加类属性 add_property_* #define add_property_long(__arg, __key, __n) add_property_long_ex(__arg, __key, strlen(__key)+1, __n TSRMLS_CC) #define add_property_null(__arg, __key) add_property_null_ex(__arg, __key, strlen(__key) + 1 TSRMLS_CC) #define add_property_bool(__arg, __key, __b) add_property_bool_ex(__arg, __key, strlen(__key)+1, __b TSRMLS_CC) #define add_property_resource(__arg, __key, __r) add_property_resource_ex(__arg, __key, strlen(__key)+1, __r TSRMLS_CC) #define add_property_double(__arg, __key, __d) add_property_double_ex(__arg, __key, strlen(__key)+1, __d TSRMLS_CC) #define add_property_string(__arg, __key, __str, __duplicate) add_property_string_ex(__arg, __key, strlen(__key)+1, __str, __duplicate TSRMLS_CC) #define add_property_stringl(__arg, __key, __str, __length, __duplicate) add_property_stringl_ex(__arg, __key, strlen(__key)+1, __str, __length, __duplicate TSRMLS_CC) #define add_property_zval(__arg, __key, __value) add_property_zval_ex(__arg, __key, strlen(__key)+1, __value TSRMLS_CC) // call_user_function ZEND_API int call_user_function(HashTable *function_table, zval **object_pp, zval *function_name, zval *retval_ptr, zend_uint param_count, zval *params[] TSRMLS_DC); ZEND_API int call_user_function_ex(HashTable *function_table, zval **object_pp, zval *function_name, zval **retval_ptr_ptr, zend_uint param_count, zval ** params[], int no_separation, HashTable *symbol_table TSRMLS_DC); ZEND_API extern const zend_fcall_info empty_fcall_info; ZEND_API extern const zend_fcall_info_cache empty_fcall_info_cache; ....
关于 zend_read_static_property 的 silent 参数，因为是 zend_std_get_static_property 的封装，
所以我们应该看 zend_std_get_static_property 的实现。
./Zend/zend_object_handlers.c:1281
if (UNEXPECTED(zend_hash_quick_find(&ce->properties_info, property_name, property_name_len+1, hash_value, (void **) &property_info)==FAILURE)) { if (!silent) { zend_error_noreturn(E_ERROR, "Access to undeclared static property: %s::$%s", ce->name, property_name); } return NULL; }
函数中有这么一段，如果没有找到属性的时候，silent=0 报 E_ERROR，silent=1 忽略报错。
HashTable 的底层函数，数组操作其实是对它们的再封装。
./Zend/zend_hash.h:100
/* startup/shutdown */ ZEND_API int _zend_hash_init(HashTable *ht, uint nSize, dtor_func_t pDestructor, zend_bool persistent ZEND_FILE_LINE_DC); ZEND_API int _zend_hash_init_ex(HashTable *ht, uint nSize, dtor_func_t pDestructor, zend_bool persistent, zend_bool bApplyProtection ZEND_FILE_LINE_DC); ZEND_API void zend_hash_destroy(HashTable *ht); ZEND_API void zend_hash_clean(HashTable *ht); #define zend_hash_init(ht, nSize, pHashFunction, pDestructor, persistent) _zend_hash_init((ht), (nSize), (pDestructor), (persistent) ZEND_FILE_LINE_CC) #define zend_hash_init_ex(ht, nSize, pHashFunction, pDestructor, persistent, bApplyProtection) _zend_hash_init_ex((ht), (nSize), (pDestructor), (persistent), (bApplyProtection) ZEND_FILE_LINE_CC) /* additions/updates/changes */ ZEND_API int _zend_hash_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC); #define zend_hash_update(ht, arKey, nKeyLength, pData, nDataSize, pDest) \ _zend_hash_add_or_update(ht, arKey, nKeyLength, pData, nDataSize, pDest, HASH_UPDATE ZEND_FILE_LINE_CC) #define zend_hash_add(ht, arKey, nKeyLength, pData, nDataSize, pDest) \ _zend_hash_add_or_update(ht, arKey, nKeyLength, pData, nDataSize, pDest, HASH_ADD ZEND_FILE_LINE_CC) ZEND_API int _zend_hash_quick_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC); #define zend_hash_quick_update(ht, arKey, nKeyLength, h, pData, nDataSize, pDest) \ _zend_hash_quick_add_or_update(ht, arKey, nKeyLength, h, pData, nDataSize, pDest, HASH_UPDATE ZEND_FILE_LINE_CC) #define zend_hash_quick_add(ht, arKey, nKeyLength, h, pData, nDataSize, pDest) \ _zend_hash_quick_add_or_update(ht, arKey, nKeyLength, h, pData, nDataSize, pDest, HASH_ADD ZEND_FILE_LINE_CC) ZEND_API int _zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC); #define zend_hash_index_update(ht, h, pData, nDataSize, pDest) \ _zend_hash_index_update_or_next_insert(ht, h, pData, nDataSize, pDest, HASH_UPDATE ZEND_FILE_LINE_CC) #define zend_hash_next_index_insert(ht, pData, nDataSize, pDest) \ _zend_hash_index_update_or_next_insert(ht, 0, pData, nDataSize, pDest, HASH_NEXT_INSERT ZEND_FILE_LINE_CC) ZEND_API int zend_hash_add_empty_element(HashTable *ht, const char *arKey, uint nKeyLength); .... /* Deletes */ ZEND_API int zend_hash_del_key_or_index(HashTable *ht, const char *arKey, uint nKeyLength, ulong h, int flag); #define zend_hash_del(ht, arKey, nKeyLength) \ zend_hash_del_key_or_index(ht, arKey, nKeyLength, 0, HASH_DEL_KEY) #define zend_hash_quick_del(ht, arKey, nKeyLength, h) \ zend_hash_del_key_or_index(ht, arKey, nKeyLength, h, HASH_DEL_KEY_QUICK) #define zend_hash_index_del(ht, h) \ zend_hash_del_key_or_index(ht, NULL, 0, h, HASH_DEL_INDEX) #define zend_get_hash_value \ zend_hash_func /* Data retreival */ ZEND_API int zend_hash_find(const HashTable *ht, const char *arKey, uint nKeyLength, void **pData); ZEND_API int zend_hash_quick_find(const HashTable *ht, const char *arKey, uint nKeyLength, ulong h, void ** pData); ZEND_API int zend_hash_index_find(const HashTable *ht, ulong h, void **pData); /* Misc */ ZEND_API int zend_hash_exists(const HashTable *ht, const char *arKey, uint nKeyLength); ZEND_API int zend_hash_quick_exists(const HashTable *ht, const char *arKey, uint nKeyLength, ulong h); ZEND_API int zend_hash_index_exists(const HashTable *ht, ulong h); ZEND_API ulong zend_hash_next_free_element(const HashTable *ht);
类与方法的访问权限修饰符，ZEND_ACC_* 。
./Zend/zend_compile.h:150
... /* method flags (types) */ #define ZEND_ACC_STATIC 0x01 #define ZEND_ACC_ABSTRACT 0x02 #define ZEND_ACC_FINAL 0x04 #define ZEND_ACC_IMPLEMENTED_ABSTRACT 0x08 /* class flags (types) */ /* ZEND_ACC_IMPLICIT_ABSTRACT_CLASS is used for abstract classes (since it is set by any abstract method even interfaces MAY have it set, too). */ /* ZEND_ACC_EXPLICIT_ABSTRACT_CLASS denotes that a class was explicitly defined as abstract by using the keyword. */ #define ZEND_ACC_IMPLICIT_ABSTRACT_CLASS 0x10 #define ZEND_ACC_EXPLICIT_ABSTRACT_CLASS 0x20 #define ZEND_ACC_FINAL_CLASS 0x40 #define ZEND_ACC_INTERFACE 0x80 #define ZEND_ACC_TRAIT 0x120 /* op_array flags */ #define ZEND_ACC_INTERACTIVE 0x10 /* method flags (visibility) */ /* The order of those must be kept - public < protected < private */ #define ZEND_ACC_PUBLIC 0x100 #define ZEND_ACC_PROTECTED 0x200 #define ZEND_ACC_PRIVATE 0x400 #define ZEND_ACC_PPP_MASK (ZEND_ACC_PUBLIC | ZEND_ACC_PROTECTED | ZEND_ACC_PRIVATE) #define ZEND_ACC_CHANGED 0x800 #define ZEND_ACC_IMPLICIT_PUBLIC 0x1000 /* method flags (special method detection) */ #define ZEND_ACC_CTOR 0x2000 #define ZEND_ACC_DTOR 0x4000 #define ZEND_ACC_CLONE 0x8000 /* method flag (bc only), any method that has this flag can be used statically and non statically. */ #define ZEND_ACC_ALLOW_STATIC 0x10000 /* shadow of parent's private method/property */ #define ZEND_ACC_SHADOW 0x20000 /* deprecation flag */ #define ZEND_ACC_DEPRECATED 0x40000 /* class implement interface(s) flag */ #define ZEND_ACC_IMPLEMENT_INTERFACES 0x80000 #define ZEND_ACC_IMPLEMENT_TRAITS 0x400000 /* class constants updated */ #define ZEND_ACC_CONSTANTS_UPDATED 0x100000 /* user class has methods with static variables */ #define ZEND_HAS_STATIC_IN_METHODS 0x800000 #define ZEND_ACC_CLOSURE 0x100000 #define ZEND_ACC_GENERATOR 0x800000 /* function flag for internal user call handlers __call, __callstatic */ #define ZEND_ACC_CALL_VIA_HANDLER 0x200000 /* disable inline caching */ #define ZEND_ACC_NEVER_CACHE 0x400000 #define ZEND_ACC_VARIADIC 0x1000000 #define ZEND_ACC_RETURN_REFERENCE 0x4000000 #define ZEND_ACC_DONE_PASS_TWO 0x8000000 /* function has arguments with type hinting */ #define ZEND_ACC_HAS_TYPE_HINTS 0x10000000 ...
例：定义一个接口，实现接口的父类，继承父类的子类.
zend_class_entry *theinterface_ce, *parentclass_ce, *childclass_ce; zend_function_entry theinterface_methods[] = { ZEND_ABSTRACT_ME(theinterface, hello, NULL) // 这里不需要第四个参数(访问权限) {NULL, NULL, NULL} }; zend_function_entry parentclass_methods[] = { ZEND_ME(parentclass_ce, hello, NULL, ZEND_ACC_PUBLIC) {NULL, NULL, NULL} }; zend_function_entry childclass_methods[] = { ZEND_ME(childclass_ce, index, NULL, ZEND_ACC_PUBLIC) {NULL, NULL, NULL} }; PHP_MINIT_FUNCTION(test) { zend_class_entry ce, p_ce, c_ce; INIT_CLASS_ENTRY(ce, "theinterface", theinterface_methods); theinterface_ce = zend_register_internal_interface(&ce TSRMLS_CC); // 实现theinterface接口的parentclass类 INIT_CLASS_ENTRY(p_ce, "parentclass", parentclass_methods); parentclass_ce = zend_register_internal_class(&p_ce TSRMLS_CC); zend_class_implements(&p_ce TSRMLS_CC, 1, theinterface_ce); // 定义parentclass的子类childclass INIT_CLASS_ENTRY(c_ce, "childclass", childclass_methods); childclass_ce = zend_register_internal_class_ex(&c_ce, &parentclass, "parentclass" TSRMLS_CC); childclass_cd->ce_flags |= ZEND_ACC_FINAL_CLASS; return SUCCESS; }
./Zend/zend_API.h 包含使用到的宏和函数原型，主要看有哪些参数和参数格式：
#define ZEND_ABSTRACT_ME(classname, name, arg_info) ZEND_FENTRY(name, NULL, arg_info, ZEND_ACC_PUBLIC|ZEND_ACC_ABSTRACT)
#define ZEND_ME(classname, name, arg_info, flags) ZEND_FENTRY(name, ZEND_MN(classname##_##name), arg_info, flags)
#define INIT_CLASS_ENTRY(class_container, class_name, functions) \ INIT_OVERLOADED_CLASS_ENTRY(class_container, class_name, functions, NULL, NULL, NULL)
ZEND_API zend_class_entry *zend_register_internal_interface(zend_class_entry *orig_class_entry TSRMLS_DC);
ZEND_API zend_class_entry *zend_register_internal_class(zend_class_entry *class_entry TSRMLS_DC);
ZEND_API void zend_class_implements(zend_class_entry *class_entry TSRMLS_DC, int num_interfaces, ...);
ZEND_API zend_class_entry *zend_register_internal_class_ex(zend_class_entry *class_entry, zend_class_entry *parent_ce, char *parent_name TSRMLS_DC);
Refer：PHP内核的数组与对象
