如何检查PHP对象在PHP4中是否具有属性。

我想检查PHP对象是否有属性。对于PHP5，我可以使用

if (property_exists($object, "foo")) {...}

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但是如何在PHP4中执行相同的操作？

您可以使用

get\u object\u vars

并检查结果数组（如果您的属性存在）

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请参阅

get\u object\u vars

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欢迎使用StackOverflow。看看如何写出一个好答案的相关信息。同样：

$obj_arr=（array）$object；打印isset（$obj_arr[“foo”]）
/***
Just as you would do for PHP5, you can apply the same concept for PHP 4. 

***/
//$data is a JSON object am receiving from a  server.
$data = json_decode(stripslashes($_REQUEST['data']));

/****
Applying the same property_exists method but remember to keep both object/class    
and the property to check for in single quotes.
*****/
if (property_exists('data', 'content')) 
{

$content = $data->content;
}