PHP对象有值但是当我尝试在FOREACH()中使用它时,我得到NULL值

时间:2010-06-25 14:26:26

标签: php soap

我正在编写一个与公司SOAP API接口的php应用程序。我正在对其中一个API函数进行调用并返回一个对象。但是,当我尝试在其中一个对象变量上使用foreach时,我收到错误:

  

警告:在......

中为foreach()提供的参数无效

我的代码:

// Make Call and get result
$result = $soapClient->GetProgramSemesterCategoryList(array("semesterGuid" => "8725a32b-e671-4386-ae70-969a6d600f31"));

// Output the result
print("<b>Result = ");
print_r($result);
print("</b></br>");

// Make sure not getting an exception
if($result->GetProgramSemesterCategoryListResult->IsException)
{
    print("Error!");
}
else
{
    // Output the type of the CategoryInfo in the object
    print("<b>TYPE: " . gettype($result->GetProgramSemesterCategoryList->Value->CategoryInfo) . "</b></br>");
    foreach($result->GetProgramSemesterCategoryList->Value->CategoryInfo as $category)
    {
        print("<b>Categories for this Semester</b></br>");

        print("<b>CategoryId:</b> " . $category->CategoryId . " - <b>CategoryGuid:</b> "
            . $category->CategoryName . " - <b>CategoryName:</b> " . $category->CategoryDesc
            . " - <b>ModuleFor:</b> " . $category->ModuleFor . "</br></br>");
    }
}

这是返回的对象:

stdClass Object ( 
    [GetProgramSemesterCategoryListResult] => stdClass Object ( 
        [Value] => stdClass Object ( 
            [CategoryInfo] => Array ( 
                [0] => stdClass Object ( 
                    [CategoryId] => 9 
                    [CategoryGuid] => 7299eb49-d75a-4719-ae18-8ce814e99931 
                    [CategoryName] => Adult Swim Lessons 
                    [CategoryDesc] => New Category 
                    [ModuleFor] => PRG_Program_Registration 
                ) 
                [1] => stdClass Object ( 
                    [CategoryId] => 10 
                    [CategoryGuid] => 4117bbaf-7301-40b2-a149-76daca62b748 
                    [CategoryName] => Child Swim Lessons 
                    [CategoryDesc] => New Category 
                    [ModuleFor] => PRG_Program_Registration 
                ) 
            ) 
        ) 
        [IsException] => 
    ) 
) 

以下是gettype调用显示的内容:

TYPE = NULL

1 个答案:

答案 0 :(得分:3)

您正在使用不同的对象名称。在foreach中,您有GetProgramSemesterCategoryList,但该对象具有GetProgramSemesterCategoryListResult。注意最后的“结果”。