Php 在后端自定义产品设置选择器中自动填充

关于我在上一次会议上成功回答的问题，我现在有选择的字段，并且希望添加自动完成的自定义字段。我尚未对此进行研究

问题: 1.如何自动填充自定义选择字段

//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 );

更新：以编程方式在选择字段中设置：

1您需要存储选项键值的关联数组：

// 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获取并取消序列化您的选择器选项：

// 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,
    )
);

现在，您的字段选择器选项已经由您从WordPress选项中获得的数据填充

要自动填充woocommerce_wp_select，必须以以下方式添加“value”键：

## 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 ) );

快速测试： 要查看它的运行情况，请将例如：“value”=>$value替换为“value”=>“two”， 然后选择的值将是：Nano

---

您好，谢谢@LoicTheAztec，但我想问的是如何像for循环一样，通过编程在选择中添加常规、纳米和微米等值。如何储存和获取？它也是通过meta吗？非常感谢。谢谢，我将为默认值执行此操作；这仍然有帮助；