我正试图从一个元框中将一些数据保存在WordPress数据库中。
我有一个下拉列表来选择一些选项，我想把选择的选项保存在数据库中，感谢元框。
然而，我在使用PHP中的保存函数时遇到了一些困难：
<?php
function add_admin_menu_class_meta_box() {
$pages = array('post', 'portfolio');
foreach( $pages as $page ) {
add_meta_box('custom_element_grid_class','Element grid size', 'custom_element_grid_class_meta_box', $page, 'side', 'high');
}
}
add_action( 'admin_menu', 'add_admin_menu_class_meta_box' );
function custom_element_grid_class_meta_box(){
?>
<label>Choose the size of the element : </label>
<select name="custom_element_grid_class" id="custom_element_grid_class">
<option value="normal" <?php selected( $meta_element_class, 'normal' ); ?>>normal</option>
<option value="square" <?php selected( $meta_element_class, 'square' ); ?>>square</option>
<option value="wide" <?php selected( $meta_element_class, 'wide' ); ?>>wide</option>
<option value="tall" <?php selected( $meta_element_class, 'tall' ); ?>>tall</option>
</select>
<?php
}
add_action('save_post', 'save_custom_element_grid_class');
function save_custom_element_grid_class(){
global $post;
if(!isset($_POST["custom_element_grid_class"])):
return $post;
endif;
update_post_meta($post->ID, 'custom_element_grid_class', $meta_element_class);
}
?>
如何获取选择值并用update_post_meta()保存？
这是我测试过的代码，它可以工作：
<?php
/**
* Plugin Name: Metabox test
*
*/
add_action( 'add_meta_boxes', 'so_custom_meta_box' );
function so_custom_meta_box($post){
add_meta_box('so_meta_box', 'Custom Box', 'custom_element_grid_class_meta_box', $post->post_type, 'normal' , 'high');
}
add_action('save_post', 'so_save_metabox');
function so_save_metabox(){
global $post;
if(isset($_POST["custom_element_grid_class"])){
//UPDATE:
$meta_element_class = $_POST['custom_element_grid_class'];
//END OF UPDATE
update_post_meta($post->ID, 'custom_element_grid_class_meta_box', $meta_element_class);
//print_r($_POST);
}
}
function custom_element_grid_class_meta_box($post){
$meta_element_class = get_post_meta($post->ID, 'custom_element_grid_class_meta_box', true); //true ensures you get just one value instead of an array
?>
<label>Choose the size of the element : </label>
<select name="custom_element_grid_class" id="custom_element_grid_class">
<option value="normal" <?php selected( $meta_element_class, 'normal' ); ?>>normal</option>
<option value="square" <?php selected( $meta_element_class, 'square' ); ?>>square</option>
<option value="wide" <?php selected( $meta_element_class, 'wide' ); ?>>wide</option>
<option value="tall" <?php selected( $meta_element_class, 'tall' ); ?>>tall</option>
</select>
<?php
}