我试图删除一个动作并以不同的优先级添加它.
以下是有助于生成消息的所有代码段：

包括必需的前端文件

private function frontend_includes() {

    require_once( $this->get_plugin_path() . '/includes/wc-memberships-template-functions.php' );
    require_once( $this->get_plugin_path() . '/includes/class-wc-memberships-shortcodes.php' );

    WC_Memberships_Shortcodes::initialize();

    $this->frontend     = $this->load_class( '/includes/frontend/class-wc-memberships-frontend.php', 'WC_Memberships_Frontend' );
    $this->checkout     = $this->load_class( '/includes/frontend/class-wc-memberships-checkout.php', 'WC_Memberships_Checkout' );
    $this->restrictions = $this->load_class( '/includes/frontend/class-wc-memberships-restrictions.php', 'WC_Memberships_Restrictions' );
}

获取产品购买受限消息

 /**
 * @param int $post_id Optional. Defaults to current post.
 * @return string
 */
public function get_product_purchasing_restricted_message( $post_id = null ) {

    if ( ! $post_id ) {

        global $post;
        $post_id = $post->ID;
    }

    $products = $this->get_products_that_grant_access( $post_id );
    $message  = $this->get_restriction_message( 'product_purchasing_restricted', $post_id, $products );

    /**
     * Filter the product purchasing restricted message
     *
     * @since 1.0.0
     * @param string $message The restriction message
     * @param int $product_id ID of the product being restricted
     * @param array $products Array of product IDs that grant access to this product
     */
    return apply_filters( 'wc_memberships_product_purchasing_restricted_message', $message, $post_id, $products );
}

限制类,处理前端的内容限制

class WC_Memberships_Restrictions {


/** @var array associative array of content conditions for current user **/
private $user_content_access_conditions;

/** @var array of post IDs that content restriction has been applied to **/
private $content_restriction_applied = array();

/** @var string Product content restriction password helper **/
private $product_restriction_password = null;

/** @var bool Product thumbnail removed helper **/
private $product_thumbnail_restricted = false;


public function __construct() {
    // Desired action to remove and re-prioritize
    add_action( 'woocommerce_single_product_summary', array( $this, 'single_product_purchasing_restricted_message' ), 30 );
}
}

实际上,我只需要在WC_Memberships_Restrictions类的操作中将优先级从30更改为15.问题在于,没有明确的方法来调用移除.有什么建议么？

解决方法:

好了,您提供的代码表明WC_Memberships_Restrictions类的实例存储在主类的stricts属性中.

$this->restrictions = $this->load_class( '/includes/frontend/class-wc-memberships-restrictions.php', 'WC_Memberships_Restrictions' );

从那里,我只需要从主插件文件的底部查找如何访问主要Membership类的实例：

/**
 * Returns the One True Instance of Memberships
 *
 * @since 1.0.0
 * @return WC_Memberships
 */
function wc_memberships() {
    return WC_Memberships::instance();
}

这意味着现在要访问限制类的实例,我们需要访问主类的限制属性.虽然听起来像泥泞,但基本上意味着：

wc_memberships()->restrictions

知道这一点,我们就可以知道从该类中删除和添加操作：

function so_41431558_change_hook_priority(){
    if( function_exists( 'wc_memberships' ) ){
        remove_action( 'woocommerce_single_product_summary', array( wc_memberships()->restrictions, 'single_product_purchasing_restricted_message' ), 30 );
        add_action( 'woocommerce_single_product_summary', array( wc_memberships()->restrictions, 'single_product_purchasing_restricted_message' ), 15 );
    }
}
add_action( 'woocommerce_single_product_summary', 'so_41431558_change_hook_priority', 1 );