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I want to add a comment to individual products in the cart page. I am new to woocommerce wordpress plugin so I have no idea how to do.

I have done some research. In that tutorial, I found that I can use woocommerce_add_cart_item_data hook this way:

add_filter( 'woocommerce_add_cart_item_data', 'add_comment', 10, 3 );

function add_comment( $cart_item_data, $product_id, $variation_id ) {

    $cart_item_data['comment'] = 'This is comment';

    return $cart_item_data;

}

but this does not work in my case.

I attach the Cart page image so you can understand.

I hope you guys understand what I want?

Thank you.

Answers

Below code will add a custom text to an item in cart:

You need to create a custom field "comment" for the product to use it here.

 add_filter( 'woocommerce_add_cart_item_data', 'add_comment', 10, 3 );

function add_comment( $cart_item_data, $product_id, $variation_id ) {

    $cart_item_data['comment'] = 'This is comment';

    return $cart_item_data;

}

Add a Custom text/comment before Cart table in Cart Page:

add_action( 'woocommerce_before_cart_table', 'add_comment' );

function add_comment() 
{
    echo '<div class="woocommerce-info">This is comment</div>';
}

Add a Custom text/comment after Cart table in Cart Page:

add_action( 'woocommerce_after_cart_table', 'add_comment' );

function add_comment() {
    echo '<div class="woocommerce-info">This is comment</div>';
}

HOW TO ADD AN INPUT FIELD TO WOOCOMMERCE CART ITEMS & Let users update input fields in the cart

https://pluginrepublic.com/how-to-add-an-input-field-to-woocommerce-cart-items/

Refer this link for a working solution to similar request: https://stackoverflow.com/a/21818028/12291365

If you are okay with using the plugin, then this plugin will do the trick: https://wordpress.org/plugins/wc-fields-factory/