Purchase Order Number Field at Checkout
Adds an optional "PO number" field to the classic checkout for business buyers and shows it on the order screen, in emails and on the customer's order page.
Opens WPIDE on
Code
$wpide_po_required = false; // Require a PO number.
add_filter( 'woocommerce_checkout_fields', function ( $fields ) use ( $wpide_po_required ) {
$fields['order']['wpide_po_number'] = array(
'type' => 'text',
'label' => 'Purchase order number',
'required' => $wpide_po_required,
'priority' => 1,
'maxlength' => 40,
);
return $fields;
} );
add_action( 'woocommerce_checkout_create_order', function ( $order, $data ) {
if ( ! empty( $data['wpide_po_number'] ) ) {
$order->update_meta_data( '_wpide_po_number', sanitize_text_field( $data['wpide_po_number'] ) );
}
}, 10, 2 );
add_action( 'woocommerce_admin_order_data_after_billing_address', function ( $order ) {
$po = $order->get_meta( '_wpide_po_number' );
if ( $po ) {
printf( '<p><strong>PO number:</strong> %s</p>', esc_html( $po ) );
}
} );
add_filter( 'woocommerce_email_order_meta_fields', function ( $fields, $sent_to_admin, $order ) {
$po = $order->get_meta( '_wpide_po_number' );
if ( $po ) {
$fields['wpide_po_number'] = array( 'label' => 'PO number', 'value' => $po );
}
return $fields;
}, 10, 3 );
add_filter( 'woocommerce_get_order_item_totals', function ( $rows, $order ) {
$po = $order->get_meta( '_wpide_po_number' );
if ( $po ) {
$rows['wpide_po_number'] = array( 'label' => 'PO number:', 'value' => esc_html( $po ) );
}
return $rows;
}, 10, 2 );Notes
Set $wpide_po_required to true to make the field mandatory; the value is saved as the order meta _wpide_po_number.
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