The called constructor method for WP_Widget is deprecated since version 4.3.0

Is this why the widget will NOT show up on ANY of my sites, even a brand-new test site with no other plugins installed?

Losing money.

I wish I could edit that message…

Sorry, I didn’t see your post from 5 days ago; I’ve quoted below in case any other impatient nerds happen upon this thread ??

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This is a bug in WordPress 4.3. They will fix it in WP 4.3.1

Use the following method to add the cart to the sidebar for now:
https://www.tipsandtricks-hq.com/ecommerce/adding-shopping-cart-to-the-sidebar-of-wordpress-site-3073

Still look like it would be a good thing to update it as some point: href=”https://gist.github.com/chriscct7/d7d077afb01011b1839d”>Important Notice for WordPress Plugins Using PHP 4 Style Constructors

You should really fix this for now. It causes all types of issues like causing the media library to not to load.

All you have to do is in wp_shopping_cart.php line: 582 change

parent::WP_Widget('wp_paypal_shopping_cart_widgets', 'WP Paypal Shopping Cart', array('description' => 'WP Paypal Shopping Cart Widget'));

to this

parent::__construct('wp_paypal_shopping_cart_widgets', 'WP Paypal Shopping Cart', array('description' => 'WP Paypal Shopping Cart Widget'));

I changed it and it fixxed all the issues it was causing.

See the codex here

I have applied the fix. Thank you.

Thanks wpgaijin – useful code and link

I am still having the problem of the widget not showing up. I’ve updated WP to 4.3, and the plugin to the newest version. I use the widget as the only ‘cart’ or ‘checkout’ (ie I don’t use a full cart page), so it’s absolutely necessary that it show up. I checked the code posted above, and it seems correct on the site. Any ideas?

https://www.nantucketcalendar.com

Still not ideal, but I added

<?php echo print_wp_shopping_cart(); ?>

to the sidebar template. I’d prefer that the cart doesn’t show when empty, but I’m not sure how to do that using this method.

@slavallee, There are shortcodes for that. The following documentation will show you what to do:
https://www.tipsandtricks-hq.com/ecommerce/adding-shopping-cart-to-the-sidebar-of-wordpress-site-3073