1

我有一个 C++ 对象，Graph它包含一个名为cattype的属性Category。我Graph在用 C++ 编写的扩展中将对象暴露给 PHP。

只要Graph's 方法返回 boolean 或 long 之类的原语，我就可以使用 ZendRETURN_*()宏（例如RETURN_TRUE();或RETURN_LONG(123);。但是我怎样才能使

Graph->getCategory();

返回一个Category供 PHP 代码操作的对象？

我正在关注http://devzone.zend.com/article/4486上的教程，这是我到目前为止的图形代码：

#include "php_getgraph.h"

zend_object_handlers graph_object_handlers;
结构图对象{
 zend_object 标准；
 图*图；
};

zend_class_entry *graph_ce;
#define PHP_CLASSNAME "WFGraph"

ZEND_BEGIN_ARG_INFO_EX(php_graph_one_arg, 0, 0, 1)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(php_graph_two_args, 0, 0, 2)
ZEND_END_ARG_INFO()


void graph_free_storage(void *object TSRMLS_DC)
{
 图对象*obj =（图对象*）对象；
 删除 obj->graph；

 zend_hash_destroy(obj->std.properties);
 FREE_HASHTABLE(obj->std.properties);

 efree(obj);
}

zend_object_value graph_create_handler(zend_class_entry *type TSRMLS_DC)
{
 zval *tmp;
 zend_object_value retval;

 graph_object *obj = (graph_object*)emalloc(sizeof(graph_object));
 memset(obj, 0, sizeof(graph_object));
 obj->std.ce = 类型；

 ALLOC_HASHTABLE(obj->std.properties);
 zend_hash_init(obj->std.properties, 0, NULL, ZVAL_PTR_DTOR, 0);
 zend_hash_copy(obj->std.properties, &type->default_properties, (copy_ctor_func_t)zval_add_ref, (void*)&tmp, sizeof(zval*));

 retval.handle = zend_objects_store_put(obj, NULL, graph_free_storage, NULL TSRMLS_CC);
 retval.handlers = &graph_object_handlers;

 返回 retval；
}

PHP_METHOD（图形，__construct）
{
 char *观点；
 int perspectives_len;
 图 *graph = NULL;
 zval *object = getThis();

 if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &perspectives, &perspectives_len) == FAILURE) {
  RETURN_NULL();
 }

 图 = 新图（观点）；
 graph_object *obj = (graph_object*)zend_object_store_get_object(object TSRMLS_CC);
 obj->图形=图形；
}
PHP_METHOD（图形，有类别）
{
 长视角Id；

 图*图；
 graph_object *obj = (graph_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
 图 = obj-> 图；

 如果（图 == NULL）{
  RETURN_NULL();
 }

 if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &perspectiveId) == FAILURE) {
  RETURN_NULL();
 }

 RETURN_BOOL(graph->hasCategory(perspectiveId));
}
PHP_METHOD（图形，getCategory）
{
 // 在这里做什么？
 返回真；
}
函数入口 php_getgraph_functions[] = {
 PHP_ME(图形,__construct,NULL,ZEND_ACC_PUBLIC|ZEND_ACC_CTOR)

 PHP_ME(Graph,hasCategory,php_graph_one_arg,ZEND_ACC_PUBLIC)
 PHP_ME(图,getCategory,php_graph_one_arg,ZEND_ACC_PUBLIC)
 {空，空，空}
};

PHP_MINIT_FUNCTION(getgraph)
{
 zend_class_entry ce;
 INIT_CLASS_ENTRY(ce, PHP_CLASSNAME, php_getgraph_functions);
 graph_ce = zend_register_internal_class(&ce TSRMLS_CC);
 graph_ce->create_object = graph_create_handler；
 memcpy(&graph_object_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
 graph_object_handlers.clone_obj = NULL；
 返回成功；
}

zend_module_entry getgraph_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
 STANDARD_MODULE_HEADER，
＃万一
 PHP_GETGRAPH_EXTNAME，
 NULL, /* 函数 */
 PHP_MINIT(getgraph),
 NULL, /* 关机 */
 空值，/* RINIT */
 NULL, /* 关机 */
 NULL, /* MINFO */
#if ZEND_MODULE_API_NO >= 20010901
 PHP_GETGRAPH_EXTVER，
＃万一
 STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_GETGRAPH
 外部“C”{
  ZEND_GET_MODULE(getgraph)
 }
＃万一
4

1 回答 1

3

在您的内部函数中，您只能返回 zval，不能返回任意 C++ 对象。在您的情况下，您必须将 Category 对象封装在资源或对象中（就像您对 Graph 对象所做的那样）。无论哪种方式，您都不能自动使用 C++ 对象的方法和属性。然后，您必须提供函数或方法（再次，就像您为 Graph 对象所做的那样），然后应该调用底层本地方法并将其结果转换为 zval。

编辑：好的，我假设你已经将 Category 类声明为 PHP 类，它的类条目表在ce_category并且你有这个类型：

struct category_object {
    zend_object std;
    Category *categ;
};

然后：

PHP_METHOD(Graph, getCategory)
{
    graph_object *obj = (graph_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
    struct category_object *co;

    //You ought to check whether obj is NULL and maybe throw an exception or call zend_error...
    if (object_init_ex(return_value, ce_category) != SUCCESS) {
        //error handling
    }

    co = (struct category_object *) zend_object_store_get_object(return_value TSRMLS_CC);
    assert (co != NULL); //should not happen; object was just created
    co->categ = retrieve_category_from_graph(obj->graph);

    /* IMPORTANT NOTE: if the Category object is held by the Graph object
     * (that is, it is freed when the Graph object is freed), you should either:
     * - Copy the Category object, so that it is independent.
     * - Increment the refcount of the PHP Graph object with
     *   zend_objects_store_add_ref(_by_handle). In that case, you should also store the
     *   handle of the PHP Graph object so that you can decrease the refcount when the
     *   PHP Category object is destroyed. Alternatively, you can store an IS_OBJECT
     *   zval and indirectly manipulate the object refcount through construction/destruction
     *   of the zval */
}
于 2010-05-12T20:31:45.637 回答