How to Access Object Properties with Illegal Names in PHP?

Accessing Object Properties with Illegal Names in PHP

In PHP, encountering objects with illegal property names (e.g., containing hyphens) can pose a challenge when accessing them. Let's address this problem by exploring the case of retrieving the todo-items property from an object returned by an API call.

To access the todo-items property, directly accessing the property as $object->todo-items will fail due to the illegal character in the property name. Instead, we can use the following methods:

1. Square Bracket Syntax:

echo $object->{'todo-items'};

This syntax encloses the property name within curly braces, allowing access to properties with illegal characters.

2. Variable Interpolation:

If the property name is stored in a variable, we can use variable interpolation to retrieve it:

$todolist = 'todo-items';
echo $object->$todolist;

3. Array Conversion:

To further simplify access to the property, we can convert the object to an array using a helper function:

$array = toArray($object);
echo $array['todo-items'];

function toArray($object) {
    $array = [];
    foreach ($object as $key => $value) {
        if (is_object($value)) {
            $array[$key] = toArray($value);
        } else {
            $array[$key] = $value;
        }
    }
    return $array;
}

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