Return PHP object by index number (not name)

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Goal: retrieve an element of data from within a PHP object by number.

This is the print_r($data) of the object:

stdClass Object
(
    [0] => stdClass Object
        (
            [TheKey] => 1456
            [ThingName] => Malibu
            [ThingID] => 7037
            [MemberOf] => California
            [ListID] => 7035
            [UserID] => 157
            [UserName] => John Doe
        )
)

I can't figure out how to pull a value out of it. This is only one record of a multi-record object that should be by id rather than a name.

These are some failed attempts to illustrate what the goal is:

echo $data -> 0 -> UserName;
echo $data[0] -> UserName;

Answers

Normally, PHP variable names can't start with a digit. You can't access $data as an array either as stdClass does not implement ArrayAccess — it's just a normal base class.

However, in cases like this you can try accessing the object attribute by its numeric name like so:

echo $data->{'0'}->UserName;

The only reason I can think of why Spudley's answer would cause an error is because you're running PHP 4, which doesn't support using foreach to iterate objects.

Wednesday, November 23, 2022

fwrgewgspois-6b95d2f181b7

Another easy way is to use the WC_Product_Factory class and then call function get_product(ID)

http://docs.woothemes.com/wc-apidocs/source-class-WC_Product_Factory.html#16-63

sample:

// assuming the list of product IDs is are stored in an array called IDs;
$_pf = new WC_Product_Factory();  
foreach ($IDs as $id) {

    $_product = $_pf->get_product($id);

    // from here $_product will be a fully functional WC Product object, 
    // you can use all functions as listed in their api
}

You can then use all the function calls as listed in their api: http://docs.woothemes.com/wc-apidocs/class-WC_Product.html

Saturday, November 26, 2022

dwing265

Keep always in mind that a very powerful feature of PHP is its Variable Variables

You can use

$attr = 'field' . $key;
$myobject->$attr;

or more concisely, using curl brackets

$myobject->{'field_'.$key};

Friday, August 5, 2022

ptbnl

edit: it's currently 2016-09-24, and PHP 5.4 has been released 2012-03-01, and support has ended 2015-09-01. Still, this answer seems to gain upvotes. If you're still using PHP < 5.4, your are creating a security risk and endagering your project. If you have no compelling reasons to stay at <5.4, or even already use version >= 5.4, do not use this answer, and just use PHP>= 5.4 (or, you know, a recent one) and implement the JsonSerializable interface

You would define a function, for instance named getJsonData();, which would return either an array, stdClass object, or some other object with visible parameters rather then private/protected ones, and do a json_encode($data->getJsonData());. In essence, implement the function from 5.4, but call it by hand.

Something like this would work, as get_object_vars() is called from inside the class, having access to private/protected variables:

function getJsonData(){
    $var = get_object_vars($this);
    foreach ($var as &$value) {
        if (is_object($value) && method_exists($value,'getJsonData')) {
            $value = $value->getJsonData();
        }
    }
    return $var;
}

Thursday, September 1, 2022

guelfey

As BoltClock mentioned there is no object literal in PHP however you can do this by simply type casting the arrays to objects:

$testArray = array(
    (object)array("name" => "John", "hobby" => "hiking"),
    (object)array("name" => "Jane", "hobby" => "dancing")
);

echo "Person 1 Name: ".$testArray[0]->name;
echo "Person 2 Hobby: ".$testArray[1]->hobby;

Friday, August 5, 2022

rand0m

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Return PHP object by index number (not name)

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