新增自定義面板

<?php
/**
 * Panel: WPCustomize
 *
 * Basic Customizer panel with basic controls.
 *
 * @since    1.0.0
 * @package  WPC
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

// Customize function.
if ( ! function_exists( 'wpc_panel_wpcustomize' ) ) {
    // Customize Register action.
    add_action( 'customize_register', 'wpc_panel_wpcustomize' );
    /**
     * Customize Panel.
     *
     * Adds a Panel, Section with basic controls.
     *
     * @param  object WP_Customize $wp_customize Instance of the WP_Customize_Manager class.
     * @since  1.0.0
     */
    function wpc_panel_wpcustomize( $wp_customize ) {
        // Panel: Basic.
        $wp_customize->add_panel( 'wpc_panel_wpcustomize', array(
            'priority'       => 10,
            'title'          => __( 'WPCustomize Panel Title', 'WPC' ),
            'description'    => __( 'Panel Description', 'WPC' ),
            'capability'     => 'edit_theme_options'
        ) );
    }
}