i’am bulding s small webapp with PHP and jlevers/selling-partner-api (https://github.com/jlevers/selling-partner-api).
i need to recover the ASIN starting from EAN code.

i have try this:

$catalogApi = $connector->catalogItems();


try {
    // EAN code of a product
    $ean = '3578830113254';

    $marketplaceId = 'APJ6JRA9NG5V4';
    $includedData = ["summaries", "images", "salesRanks", "productTypes", "identifiers", "variations"];

    //search EAN
    $response = $catalogApi->searchCatalogItems([
        'marketplaceIds' => [$marketplaceId],  
        'identifiersType' => 'EAN',            
        'identifiers' => [$ean],                
        'includedData' => $includedData        
    ]);

    // Visualizza la risposta
    echo "<pre>";
    print_r($response);
    echo "</pre>";

} catch (Exception $e) {
    // Gestisci gli errori
    echo "Errore: ";
    var_dump($e->getMessage());
}

but i recive this strange error:

SellingPartnerApiSellerCatalogItemsV20220401Api::getCatalogItem(): Argument #1 ($asin) must be of type string, array given