如果你想要一个元框,这个就可以了。这将取决于您想在其中放置什么以及如何保存/渲染每个字段。
此示例改编自add_meta_box.
if ( is_admin() ) {
add_action( \'load-post.php\', \'BoxPost::init\' );
add_action( \'load-post-new.php\', \'BoxPost::init\' );
}
if( ! class_exists(\'BoxPost\')) :
/**
* The Class.
*/
class BoxPost {
const SLUG = "boxpost_meta_box_name";
const NONCE_SLUG = "boxpost_inner_custom_box";
const NONCE = "boxpost_inner_custom_box_nonce";
const TEXT_DOMAIN = \'text_domain\';
/**
* Hook into the appropriate actions when the class is constructed.
*/
static public function init() {
add_action( \'add_meta_boxes\', \'BoxPost::add_meta_box\' );
add_action( \'save_post\', \'BoxPost::save\' );
}
/**
* Adds the meta box container.
*/
static public function add_meta_box( $post_type ) {
$post_types = array(\'post\', \'page\'); //limit meta box to certain post types
if ( in_array( $post_type, $post_types )) {
add_meta_box(
self::SLUG
, __( \'BoxPost Headline\', self::TEXT_DOMAIN )
, \'BoxPost::render_meta_box_content\'
, $post_type
, \'advanced\'
, \'high\' // \'high\', \'core\', \'default\' or \'low\'
);
}
}
/**
* Save the meta when the post is saved.
*
* @param int $post_id The ID of the post being saved.
*/
static public function save( $post_id ) {
/*
* We need to verify this came from the our screen and with proper authorization,
* because save_post can be triggered at other times.
*/
// Check if our nonce is set.
if ( ! isset( $_POST[ self::NONCE ] ) )
return $post_id;
$nonce = $_POST[ self::NONCE ];
// Verify that the nonce is valid.
if ( ! wp_verify_nonce( $nonce, self::NONCE_SLUG ) )
return $post_id;
// If this is an autosave, our form has not been submitted,
// so we don\'t want to do anything.
if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE )
return $post_id;
// Check the user\'s permissions.
if ( \'page\' == $_POST[\'post_type\'] ) {
if ( ! current_user_can( \'edit_page\', $post_id ) )
return $post_id;
} else {
if ( ! current_user_can( \'edit_post\', $post_id ) )
return $post_id;
}
/* OK, its safe for us to save the data now. */
// Sanitize the user input.
$mydata = sanitize_text_field( $_POST[\'boxpost_meta_field\'] );
// Update the meta field.
update_post_meta( $post_id, \'_boxpost_meta_field_value_key\', $mydata );
}
/**
* Render Meta Box content.
*
* @param WP_Post $post The post object.
*/
static public function render_meta_box_content( $post ) {
// Add an nonce field so we can check for it later.
wp_nonce_field( self::NONCE_SLUG, self::NONCE );
// Use get_post_meta to retrieve an existing value from the database.
$value = get_post_meta( $post->ID, \'_boxpost_meta_field_value_key\', true );
// Display the form, using the current value.
echo \'<label for="boxpost_meta_field">\';
_e( \'Description for this field\', self::TEXT_DOMAIN );
echo \'</label> \';
echo \'<input type="text" id="boxpost_meta_field" name="boxpost_meta_field"\';
echo \' value="\' . esc_attr( $value ) . \'" size="25" />\';
}
}
endif; //BoxPost
要稍后获取值,请执行以下操作:
$value = get_post_meta( $post->ID, \'_boxpost_meta_field_value_key\', true );