php 在帖子中添加元变量（自定义字段，ej template-slug）#wordpress

Posted 2021-05-05

<?php 


 
 
/**
*   Metabox for Template Slug field 
*/ 
add_action( 'add_meta_boxes', 'ingamana_add_meta_box' );
function ingamana_add_meta_box()
{
    $user = wp_get_current_user();
    $userRole = $user->roles[0];
    
    if ($userRole != 'administrator') return;
    
    $screen = get_current_screen();
    $postType = $screen->post_type;
    
    if ($postType == 'page') {
        add_meta_box(
            'ingamana_add_meta_box', 
            __( 'Template Slug' ), 
            'ingamana_add_meta_box_cb',
            null, 
            'side', 
            'low' 
        );
    }    
}


/**
 * Callback function for our meta box.
 */
function ingamana_add_meta_box_cb( $post )
{
    $values = get_post_custom( $post->ID );
    $templateSlug = (isset($values['template-slug']))? $values['template-slug'][0] : ''; 
    wp_nonce_field( 'my_meta_box_nonce', 'meta_box_nonce' );
?>
    <label for="template-slug">Slug</label>
    <input type="text" name="template-slug" id="template-slug" value="<?= $templateSlug ?>"/>
<?php    
} 

 
/**
*   Save Metabox field
*/ 
add_action( 'save_post', 'ingamana_meta_box_save' );
function ingamana_meta_box_save($post_id) 
{
    $screen = get_current_screen();
    $postType = $screen->post_type;
    $user = wp_get_current_user();
    $userRole = $user->roles[0];
    
    
    if ($postType !== 'page') return;

    if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
     
    if( !isset($_POST['meta_box_nonce']) || !wp_verify_nonce($_POST['meta_box_nonce'], 'my_meta_box_nonce' )) return;

    if( !current_user_can('edit_post') ) return;
    
    if ($userRole != 'administrator') return;

    
    $templateSlug = isset($_POST['template-slug'])? $_POST['template-slug'] : '';
    update_post_meta( $post_id, 'template-slug', $templateSlug);    
}