找到你网站名为functions.php的文件，然后添加以下代码：

add_filter('get_avatar', 'qq_img', 10, 2);

function qq_img($avatar,$id_or_email)

{

$email = '';

//获取邮箱

if (is_numeric($id_or_email)){

$id = (int)$id_or_email;

$user = get_userdata($id);

if ($user)

$email = $user->user_email;

}else if(is_object($id_or_email)){

if (!empty($id_or_email->user_id)){

$id = (int)$id_or_email->user_id;

$user = get_userdata($id);

if ($user)

$email = $user->user_email;

}else if(!empty($id_or_email->comment_author_email)){

$email = $id_or_email->comment_author_email;

}

}else{

$email = $id_or_email;

}

$hash = md5(strtolower(trim($email)));

$url = 'https://avatar.zrahh.com/avatar/' . $hash;

if(stripos($email,"@qq.com"))//判断是否为QQ邮箱

{

$qq=str_ireplace("@qq.com","",$email);

if(preg_match("/^\d+$/",$qq))//正则过滤英文邮箱

{

$qqavatar="https://q2.qlogo.cn/headimg_dl?dst_uin=".$qq."&spec=100";

return '<img src="'.$qqavatar.'"class="avatar avatar-50 photo" width="50" height="50" alt="avatar" />';

}else{ //如果是英文QQ邮箱就调用Gravatar头像

return '<img src="'.$url.'"class="avatar avatar-50 photo" width="50" height="50" alt="avatar" />';

}

}else{ //不是QQ邮箱

return '<img src="'.$url.'"class="avatar avatar-50 photo" width="50" height="50" alt="avatar" />';

}

}