我想在产品帖子类型中添加一个复选框。所以我写了代码
add_action( 'add_meta_boxes', 'smashing_add_post_meta_boxes' );
/* Create one or more meta boxes to be displayed on the post editor screen. */
function smashing_add_post_meta_boxes() {
add_meta_box(
'smashing-post-class', // Unique ID
esc_html__( 'Post Class', 'example' ), // Title
'smashing_post_class_meta_box', // Callback function
'product', // Admin page (or post type)
'side', // Context
'default' // Priority
);
}
/* Display the post meta box. */
function smashing_post_class_meta_box( $object, $box ) { ?>
<?php wp_nonce_field( basename( __FILE__ ), 'smashing_post_class_nonce' ); ?>
<p>
<label for="smashing-post-class"><?php _e( "Add a custom CSS class, which will be applied to WordPress' post class.", 'example' ); ?></label>
<br />
<input class="widefat" type="checkbox" name="smashing-post-class" id="smashing-post-class" value="<?php echo esc_attr( get_post_meta( $object->ID, 'smashing_post_class', true ) ); ?>" size="30" />What's New
</p>
<?php }
/* Save post meta on the 'save_post' hook. */
add_action( 'save_post', 'smashing_save_post_class_meta', 10, 2 );
/* Save the meta box's post metadata. */
function smashing_save_post_class_meta( $post_id, $post ) {
/* Verify the nonce before proceeding. */
if ( !isset( $_POST['smashing_post_class_nonce'] ) || !wp_verify_nonce( $_POST['smashing_post_class_nonce'], basename( __FILE__ ) ) )
return $post_id;
/* Get the post type object. */
$post_type = get_post_type_object( $post->post_type );
/* Check if the current user has permission to edit the post. */
if ( !current_user_can( $post_type->cap->edit_post, $post_id ) )
return $post_id;
/* Get the posted data and sanitize it for use as an HTML class. */
$new_meta_value = ( isset( $_POST['smashing-post-class'] ) ? sanitize_html_class( $_POST['smashing-post-class'] ) : '' );
/* Get the meta key. */
$meta_key = 'smashing_post_class';
/* Get the meta value of the custom field key. */
$meta_value = get_post_meta( $post_id, $meta_key, true );
/* If a new meta value was added and there was no previous value, add it. */
if ( $new_meta_value && '' == $meta_value )
add_post_meta( $post_id, $meta_key, $new_meta_value, true );
/* If the new meta value does not match the old value, update it. */
elseif ( $new_meta_value && $new_meta_value != $meta_value )
update_post_meta( $post_id, $meta_key, $new_meta_value );
/* If there is no new meta value but an old value exists, delete it. */
elseif ( '' == $new_meta_value && $meta_value )
delete_post_meta( $post_id, $meta_key, $meta_value );
}
如何更改代码以获取复选框值,并检查是否有人在之前选中了复选框。
在这里,我只更改了输入框&#34; text&#34;到&#34;复选框&#34;。但我不知道如何创建一个复选框。请帮我。我是wordpress的新手。
答案 0 :(得分:0)
您需要为复选框指定一个值。如果尚未设置,您可能想要考虑该值是什么。
value="<?php echo esc_attr( get_post_meta( $object->ID, 'smashing_post_class', true ) ); ?>"
在新帖子上没有设置。所以你可以做类似
的事情value="<?php if ($x=get_post_meta( $object->ID, 'smashing_post_class', true ) ) {echo $x;}else{echo "whatever";} ?>"
您已经将值保存到post_meta(请参阅$ new_meta_value),因此设置值的代码已经从数据库中提取它(如果存在)。
您可能想重新考虑上述方式。从现在开始,复选框值始终相同。您也可以将值设置为您现在想要的值。 E.g。
<input type="checkbox" name="whatever" value="true"> select me for fun
您可以在保存元框功能
中访问已发布的值$value= $_POST['whatever'];
并保存到post meta(一个单独的数据库表,用于自定义值和一些其他不适合wp_posts的值)
update_post_meta($post_id, '_keyname', $value);