在後端自動填充WooCommerce自定義產品設置選擇器

Question

關於我的上一個問題已成功地在Retrieving WC Custom Field回答我現在有選擇的字段，並希望添加自動完成的自定義字段（我還沒有研究這個）

問題： 1.）如何自動填充自定義選擇字段？

//Adding the custom field select 
woocommerce_wp_select( 
array( 
'id' => '_select', 
'label' => __('SIM Type', 'woocommerce'), 
'options' => array(
'one' => __('Regular', 'woocommerce'), 
'two' => __('Nano', 'woocommerce'), 
'three' => __('Micro', 'woocommerce') 
) 
) 
); 

//Saving 
$woocommerce_select = $_POST['_select']; 
if(!empty($woocommerce_select)) 
update_post_meta($post_id, '_select', esc_attr($woocommerce_select)); 

// Display Custom Field Value 
echo get_post_meta($post->ID, '_select', true); 

Answer 1

更新：設置編程的<option>在選擇字段：

1）您將需要存儲你的選擇關鍵值的關聯數組：

// The associative array to store (once) 
$options_array = array(
    '' => __('Select a value', 'woocommerce'), // default empty value 
    'one' => __('Regular', 'woocommerce'), 
    'two' => __('Nano', 'woocommerce'), 
    'three' => __('Micro', 'woocommerce') 
); 

// Serialize the array as a string 
$option_str = maybe_serialize($options_array); 

// Save this array in Wordpress options 
update_option('my_custom_selector_options', $option_str); 

2）獲取並反序列化您的選擇器選項：

// Get your options select data 
$select_options_str = get_option('my_custom_selector_options'); 

// Unserialize this data: 
$select_options_arr = maybe_unserialize($select_options_str); 

// Get the saved selected 'value' if it exist 
$value = get_post_meta($post->ID, '_select', true); 
if(empty($value)) $value = ''; // When 'value' is not defined 

// 
woocommerce_wp_select(
    array(
     'id' => '_select', 
     'label' => __('SIM Type', 'woocommerce'), 
     'options' => $select_options_arr, 
     'value' => $value, 
    ) 
); 

因此，現在您的字段選擇器選項已被您從WordPress選項獲得的數據填充。

---

自動填寫的woocommerce_wp_select()，你必須添加一個'value'關鍵這樣：

## 1. The select (dropdown) 

// Get the 'value' data if it exist 
$value = get_post_meta($post->ID, '_select', true); 
if(empty($value)) $value = ''; // When 'value' is not defined 

woocommerce_wp_select(
    array(
     'id' => '_select', 
     'label' => __('SIM Type', 'woocommerce'), 
     'options' => array(
      '' => __('Select a value', 'woocommerce'), // Added a default empty value 
      'one' => __('Regular', 'woocommerce'), 
      'two' => __('Nano', 'woocommerce'), 
      'three' => __('Micro', 'woocommerce') 
     ), 
     'value' => $value, // <=== === === === === HERE set the 'value' key (autofill) 
    ) 
); 

## --------------------------------- 

## 2. SAVING 

$woocommerce_select = $_POST['_select']; 
// The Default empty value is not saved (added in this condition below) 
if(!empty($woocommerce_select) || $woocommerce_select != '') 
    update_post_meta($post_id, '_select', esc_attr($woocommerce_select)); 

快速測試：
要看到它在行動，取代例如：'value' => $value,由'value' => 'two',
然後選擇值爲：納米 ...