PHP：从StdClass对象获取输出

Question

Here is an array of output from a class. How can I echo "Custom Field #1" on the screen?

WPGMZA\CustomFields Object ( 
    [fields] => Array ( 
        [0] => stdClass Object ( 
            [id] => 1 
            [name] => Custom Field #1 
            [icon] => address-book-o 
            [attributes] => {"elementary":"true"} 
            [widget_type] => dropdown 
        )
    ) 
)

Answer 1

Having made fields public and therefore accessible you can access array values using [index] and object properties using ->key for example $YourClassIntance->fields[0]->id should return 1

If you the keys of the JSON variable attributes then you could do:

$keys = array_keys(json_decode($YourClassIntance->fields[0]->attributes, true));

In this case to echo the first key you would do echo $keys[0];