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1. Advanced Customization:
Custom Fields
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2. "Custom Field"
"Custom Fields (post meta, metadata)
allow you to store additional
information with each WordPress post.
They can then be displayed/used
anywhere"
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3. WC Product = WP Post + CF
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4. Some WC Product Custom Fields!
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● '_visibility'
● '_sku'
● '_price'
● '_regular_price'
● '_sale_price'
● '_sale_price_dates_from'
● '_sale_price_dates_to'
● 'total_sales'
● '_tax_status'
● '_tax_class'
● '_manage_stock'
● '_stock'
● '_stock_status'
● '_backorders'
● '_low_stock_amount'
● '_sold_individually'
● '_weight'
● '_length'

5. Custom Fields Benefits
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● Target specific post/product ID (conditional
behavior)
● Store information forever
● Use it or return it to screen
whenever/wherever you like: alter
behaviour (price) or add data (e.g. RRP)

6. (1a) Add Custom Field Manually
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7. (1b) Add Custom Field By Code
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update_post_meta( $post_id, $meta_key, $meta_value );
update_post_meta( 456, 'packaging_weight', '2' );
(codex.wordpress.org/Function_Reference/update_post_meta)

8. (2) Get Custom Field By Code
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get_post_meta( $post_id, $meta_key, $single = false );
echo get_post_meta( 456, 'packaging_weight', true );
echo get_post_meta( 789, 'total_sales', true );
echo get_post_meta( 123, '_regular_price', true );
echo $product->get_regular_price();
(developer.wordpress.org/reference/functions/get_post_meta/)

9. Custom Fields Workflow
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1. Project specs e.g. "Display packaging weight
@ product ID = 556"
2. Add custom field name=>value @ product ID
= 556
3. Get post meta and return it to the screen