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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;



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

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


// 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:

Saturday, November 26, 2022

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

You can use

$attr = 'field' . $key;

or more concisely, using curl brackets

Friday, August 5, 2022

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

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
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