Retrieving PHP property name as string

Question

I have some JSON, if I var_dump the output looks like:

var_dump( $oJSON->{$oQ->sQuestionName} );

object(stdClass)[14]
  public 'Lease' => boolean true

I would like to retrieve 'Lease' as a string.

I've tried casting it:

(string)$oJSON->{$oQ->sQuestionName}

but it returns an E_RECOVERABLE:

E_RECOVERABLE_ERROR Error: Object of class stdClass could not be converted to string

The following works, however I feel there must be a better way?

array_shift(array_values(array_keys(get_object_vars($oJSON->{$oQ->sQuestionName}))));

N.B. I can't use to use the following due to compatability issues

array_keys(get_object_vars($oJSON->{$oQ->sQuestionName}))[0]

I can't use to use the following due to compatability issues just split it into two lines. — Rizier123
– Rizier123, Commented Nov 29, 2016 at 16:25
yeah I could do that. Assign to a var, then go to first pos. However it feels there must be some other method? — atoms
– atoms, Commented Nov 29, 2016 at 16:26

Kevin Stich · Accepted Answer · 2016-11-29 16:26:59Z

1

Use ReflectionClass::getProperties() to get a list of the object's properties.

$reflect = new ReflectionClass($foo);
$props = $reflect->getProperties(ReflectionProperty::IS_PUBLIC | ReflectionProperty::IS_PROTECTED);

answered Nov 29, 2016 at 16:26

Kevin Stich

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Comments

Hanky Panky · Accepted Answer · 2016-11-29 16:33:08Z

1

You can convert your desired object to an array first

   $array = (array) $oJSON->{$oQ->sQuestionName};

Then you can take its first element's key

   echo key($array);  // Should say Lease

answered Nov 29, 2016 at 16:24

Hanky Panky

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Kristiyan · Accepted Answer · 2016-11-29 16:28:54Z

0

You can use json_decode with second parameter true

For example:

$str = '{"0":{"id":"123","name":"Title"}}';
var_dump(json_decode($str,true));

So, you will have an array with string objects.

answered Nov 29, 2016 at 16:28

Kristiyan

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