PHP将变量强制转换为foreach循环中的对象类型 [英] PHP Casting Variable as Object type in foreach Loop

问题描述

在以下代码中， $ quiz_object->个性包含一组个性对象。

Within the following code, $quiz_object->personalities contains an array of Personality objects.

// Loop through each personality that exists for the quiz
foreach($quiz_object->personalities AS $existing_personality)
{

    // Show all of the existing personalities
    echo $existing_personality->GetQuizMakerPersonalityHTML();
}

如何投射（我认为这是正确的词）变量在foreach循环中 $ existing_personality 作为对象类型？

How do I "cast" (I think that's the right word) my variable $existing_personality within the foreach loop as the object type?

我希望这样做，以便在键入 $ existing_personality-> ，我会获得该对象类型可用的公共功能列表。

I wish to do this so that when I type $existing_personality->, I get the list of public functions available for that object type.

更新

此刻，Zend Studio不知道我要遍历一系列个性循环中的对象，它只是认为这是一个标准变量。但是，它是一种类型，我的代码运行良好。我只希望IDE在foreach循环中的变量上有IDE提示。

At the moment, Zend Studio doesn't know I am looping through an array of Personality objects within the loop, it just thinks it's a standard variable. However, it is a type and my code works perfectly well. I just want the IDE hints on my variable within the foreach loop.

为了使我很清楚，如果我有其他所有对象，这些提示也会出现： / p>

Just so that I'm clear, the hints appear for every other object, if I have:

$personality_object = new Personality();

// I get the IDE hints here
echo $personality_object->MyFunction();

但是，一旦我开始循环使用foreach，Zend便无法知道我在

But as soon as I start looping in a foreach, Zend has no way of knowing that I'm looping through an array of Objects.

这是在我的 Personality 对象中最初定义个性数组的方式：

This is how the array of personalities is defined initially within my Personality object:

class Personality
{

    // Array of Personality objects
    public $personalities = array();

}

推荐答案

在Netbeans和IntelliJ中，您可以在注释中使用 @var ：

In Netbeans and IntelliJ you are able to use @var in a comment:

/* @var $variable ClassName */
$variable->

IDE现在将知道$ variable是ClassName类，并在<$ c $之后提示c>-> 。

The IDE will now know that $variable is of the class ClassName and hint after the ->.

您也可以在自己的IDE中进行尝试。

You can try it out in your own IDE as well.

您还可以在 getPersonalities（）方法中创建 @return 批注，说明返回将是 ClassName [] ，表示ClassName对象的数组：

You can also create a @return annotation in a getPersonalities() method stating that the return will be a ClassName[], which means an array of ClassName objects:

/**
 * Returns a list of Personality objects
 * @return Personality[]
 */
function getPersonalities() {
    return $this->personalities;
}

这还取决于您的IDE如何解释这种类型的提示。

this also depends on how your IDE is interpreting this type of hinting.

要在foreach循环中使用它，您可以执行1：

To use this in foreach loops you can do 1:

/* @var $existing_personality Personality */
foreach( $quiz_object->personalities as $existing_personality ){
}

或2：

foreach( $quiz_object->getPersonalities() as $existing_personality ){
}

如果您的IDE足够好，都应该启用IDE提示。

both should enable IDE hinting, if your IDE is kind enough.

另外，如果您想在自己的类中使用它，可以在声明类变量时使用相同的签名：

As an extra note, if you want to use this inside it's own class, you can use the same signature when declaring a class variable:

class MyClass
{ 

    /** 
    * @var ClassName[] $variable List of ClassName objects. 
    */ 
    var $variable;

}

这篇关于PHP将变量强制转换为foreach循环中的对象类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！