我正在使用一个简单的插件“ user following system”，而我需要做的就是在用户获得新关注者之后发送电子邮件。
我认为这是插件代码的重要部分：
structure(list(origin_coords = c("31.9618,-83.0588", "44.8782,-69.4718",
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-97.4751, -73.2111, -121.1896)), row.names = c(NA, 100L), class = "data.frame")
，并在此处检查用户是否在关注另一个人：
function pwuf_follow_user( $user_id, $user_to_follow ) {
$following = pwuf_get_following( $user_id );
if ( $following && is_array( $following ) ) {
$following[] = $user_to_follow;
} else {
$following = array();
$following[] = $user_to_follow;
}
// retrieve the IDs of all users who are following $user_to_follow
$followers = pwuf_get_followers( $user_to_follow );
if ( $followers && is_array( $followers ) ) {
$followers[] = $user_id;
} else {
$followers = array();
$followers[] = $user_id;
}
do_action( 'pwuf_pre_follow_user', $user_id, $user_to_follow );
// update the IDs that this user is following
$followed = update_user_meta( $user_id, '_pwuf_following', $following );
// update the IDs that follow $user_id
$followers = update_user_meta( $user_to_follow, '_pwuf_followers', $followers );
// increase the followers count
$followed_count = pwuf_increase_followed_by_count( $user_to_follow ) ;
if ( $followed ) {
do_action( 'pwuf_post_follow_user', $user_id, $user_to_follow );
return true;
}
return false;
}
我尝试在更新用户元后添加此代码，但是什么也没有发生！
function pwuf_is_following( $user_id, $followed_user ) {
$following = pwuf_get_following( $user_id );
$ret = false; // is not following by default
if ( is_array( $following ) && in_array( $followed_user, $following ) ) {
$ret = true; // is following
}
return $ret;
}
答案 0 :(得分：0)
我相信您希望在其他用户关注另一个用户时向其发送电子邮件。在这种情况下，插件中有可用的动作钩子，该钩子将在以下过程成功执行时执行：
do_action( 'pwuf_post_follow_user', $user_id, $user_to_follow );
您可以将自己的代码挂接到该动作
add_action('pwuf_post_follow_user', $user_id, $user_to_follow) {
$follower = get_userdata($user_id);
$recipient = get_userdata($user_to_follow);
$recipient_email = $recipient->user_email;
$body = sprintf('%s followed your work!', $follower->display_name );
wp_mail( $recipient_email , 'New follower!', $body );
}
Refernece：https://codex.wordpress.org/Function_Reference/get_userdata