Amazon Product API: write output results to a csv

I need to write the output from a search request to Amazon Product Api to a CSV (I want to import that into Woocommerce)

Here's what the output looks like (in this exemple, the results returns 2 products)

Array
(
    [0] => stdClass Object
        (
            [ASIN] => B01DA1WRO2
            [DetailPageURL] => https://www.amazon.fr/dp/B01DA1WRO2?tag=xxx-21&linkCode=osi&th=1&psc=1
            [ItemInfo] => stdClass Object
                (
                    [Title] => stdClass Object
                        (
                            [DisplayValue] => Table d'inversion pliable Yatek ECO avec inversion totale, Supporte jusqu'à 150 kg de poids
                            [Label] => Title
                            [Locale] => fr_FR
                        )

                )

            [Offers] => stdClass Object
                (
                    [Listings] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [Id] => fPdGxBfkTPXhuerR8oHG3BgPbaCR3xtxg4%2B6rXcsMyN1etFVqC6VniXAVFRaFnPWbpz69CGr1EHO5sBLLPMfsbxosLW7C5EpOGTwaulFgrEFH9xeRP8DWgGcX55SwHHwpvL3x8wudeatAN09NhBXFlUAH64HOq%2BIWqPuNq1D1r7JRy%2BMP0lNrQ%3D%3D
                                    [Price] => stdClass Object
                                        (
                                            [Amount] => 159
                                            [Currency] => EUR
                                            [DisplayAmount] => 159,00 €
                                        )

                                    [ViolatesMAP] => 
                                )

                        )

                )

        )

    [1] => stdClass Object
        (
            [ASIN] => B00IR7Z5E4
            [DetailPageURL] => https://www.amazon.fr/dp/B00IR7Z5E4?tag=xxx-21&linkCode=osi&th=1&psc=1
            [ItemInfo] => stdClass Object
                (
                    [Title] => stdClass Object
                        (
                            [DisplayValue] => Sportplus Table d'inversion Pliable, avec système Perfect-Balance, entraîneur à la gravité, 5 Angles d'inversion, soulage la Colonne vertébrale, Max. 135 kg, SP-INV-010
                            [Label] => Title
                            [Locale] => fr_FR
                        )

                )

            [Offers] => stdClass Object
                (
                    [Listings] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [Id] => fPdGxBfkTPXhuerR8oHG3F%2BdHN8m1gG9kD8UWyw0Vt1A5I7hS%2B1VMB6AI0pD3wa3klDLwl54feL%2BFQYdTcY33QtAzK%2FvhHi7j%2Fwc7Cm6JPEQnPYzZimYkTc6zqS9GvfN2jUiPb%2FT5AY%3D
                                    [Price] => stdClass Object
                                        (
                                            [Amount] => 169.99
                                            [Currency] => EUR
                                            [DisplayAmount] => 169,99 €
                                        )

                                    [ViolatesMAP] => 
                                )

                        )

                )

            [ParentASIN] => B0747RXCK3
        )

)

The result is an array that I call $search and if I want to display the data (for exemple the ASIN of the products on a web page), I just do:

 foreach ($search as $item) {
 echo '$item->ASIN';
}

But I don't understand how to store all the results in a csv file for later use with woocommerce.

Thanks for your help