CODEWITHSUNDEEP
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melvnberd
melvnberd

Reputation: 3163

How to use Property_exist on this class with get() method of accessing Data

Good Day, I know this is kinda easy to some, but I cant understand how to access data with this kind of structure..

this was the result when I print_r($Invoice);

and I get to access them using $Invoice->getId() for example.. ( though I dont really understand why)

now I want to check if the property exist so I could do and if else statement.

I tried using if(property_exist($Invoice,'DocNumber')){ echo "exist"; } but it seems not working.

Please help me do this things. Thanks 

  QuickBooks_IPP_Object_Invoice Object
    (
        [_data:protected] => Array
            (
                [Id] => Array
                    (
                        [0] => {-183}
                    )

                [SyncToken] => Array
                    (
                        [0] => 2
                    )

                [MetaData] => Array
                    (
                        [0] => QuickBooks_IPP_Object_MetaData Object
                            (
                                [_data:protected] => Array
                                    (
                                        [CreateTime] => Array
                                            (
                                                [0] => 2017-06-21T01:16:22-07:00
                                            )

                                        [LastUpdatedTime] => Array
                                            (
                                                [0] => 2017-06-26T15:42:53-07:00
                                            )

                                    )

                            )

                    )

                [DocNumber] => Array
                    (
                        [0] => 4107
                    )

                [TxnDate] => Array
                    (
                        [0] => 2017-07-01
                    )

                [CurrencyRef] => Array
                    (
                        [0] => {-USD}
                    )

                [CurrencyRef_name] => Array
                    (
                        [0] => United States Dollar
                    )



            )

    )

Upvotes: 1

Views: 56

Answers (2)

robjingram
robjingram

Reputation: 306

If the properties are protected, as indicated by [_data:protected] then you won't be able to access them directly, by using $Invoice->Id for example. You will only be able to read them if the class has accessor methods defined.

$Invoice->getId() works because it is a call to such an accessor method which is returning the value of the $Id property.

If you don't have access to the source code of this class, or some API documentation for it, then a good IDE may be able to tell you what methods are available on it.

Update

Looking at the source code of the Object class, which is an ancestor of the Invoice class, it implements a catch-all __call method which will be run for any method call that doesn't match an existing method. __call checks if the name of the method starts with get or set. If so it will return or update values in the _data array respectively, e.g. getSyncToken() will return the value of _data['SyncToken']. This is why your calls such as $Invoice->getId() return values even though there is no getId() method on the class.

Upvotes: 1

Shuchi Sethi
Shuchi Sethi

Reputation: 803

if(property_exist($Invoice,'DocNumber')){ echo "exist"; }

does not work since 'DocNumber' is not a property of class Invoice. However,

 if(property_exist('Invoice','_data')){ echo "exist"; }

will work, since, _data is property of class Invoice.

It would have been different if _data wasn't protected.

You can however, make this work using reflection. Create a function:

function accessProtected($obj, $prop) {
  $reflection = new ReflectionClass($obj);
  $property = $reflection->getProperty($prop);
  $property->setAccessible(true);
  return $property->getValue($obj);
}

$instance = new Invoice();
$access_properties = accessProtected($instance, '_data');
if(array_key_exists('DocNumber', $access_properties)) {
   echo "exists";
}

Function accessProtected is referred from here

Upvotes: 1

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