从PHP中的对象获取属性

Question

Have to do some php coding but I am totally new to it. The question is I was trying to get a property value from an object called $mgm_member, this object is from wordpress plugin which records website's member info. First I use:

var_dump(get_object_vars($mgm_member)); 

The results shows that this obeject has 37 properties and all of them have values. Than I tried use

var_dump($mgm_member->phone);

The result is null. I tried many other properties but only the first property of this object have value. Can anyone help me? Thank you very much.

well I suppose if the scope of "phone" is private var_dump will not be able to access and view it, is it? In my case, I can view all properties and their values using var_dump() function but when I tried to get one property it just doesn't work. However,I can get the first property "id" using the same code

echo $mgm_member->id;

That is really weird.

Answer 1

var_dump(get_object_vars($mgm_member)); shows the object variables. If you are getting data with this line of code, you have data in your object.

You can access properties of a variable in your code with $mgm_member->phone - why not do so?

If you want to place the data into a variable you can use something like this:

$myVar=$mgm_member->phone;

but that defeats the purpose of OOP. Why not refer to it as exactly $mgm_members->phone all the way through your code?

Edit: As you point out, the property is private which means that only the object itself can use it. You could get around this by modifying the object, but this may be a nasty approach - it is private for a reason. Can you not use functions within the object to display the values? Alternately, is there a function you can use in the object to return you a clone of the object with different property attributes?

Answer 2

As the property is 'private' you will need to make a function to access and return it .

A dump may display them but you WILL NOT be able to directly access a 'private' property.

class .... {

    public function getPhone()
    {
        return ($this->phone);
    }

}

then:

echo $mgm_member->getPhone();