WordPress のダッシュボードにメモが書けるようにする

忘れないように備忘録です

function dashboard_memo_widget_setup() {
    //if ( ! current_user_can( 'administrator' ) ) return;
    wp_add_dashboard_widget(
        'dashboard-memo-widget',
        'メモ',
        'dashboard_memo_widget',
        'dashboard_memo_widget_option_form'
    );
}

add_action( 'wp_dashboard_setup', 'dashboard_memo_widget_setup' );

function dashboard_memo_widget() {
    $memo = get_option( 'dashboard-memo-widget-memo', '' );
    if ( $memo === '' ) {
        echo '<p>メモはありません。<p>' . "\n";
    } else {
        echo '<p>' . nl2br( esc_textarea( $memo ) ) . '<p>' . "\n";
    }
}

function dashboard_memo_widget_option_form() {
    if ( isset( $_POST['dashboard-memo'] ) ) {
        update_option( 'dashboard-memo-widget-memo', $_POST['dashboard-memo'] );
    }
    $memo = get_option( 'dashboard-memo-widget-memo', '' );
    echo '<p><textarea id="dashboard-memo" class="widefat" name="dashboard-memo" rows="3">' . esc_textarea( $memo ) . '</textarea></p>';
}