WordPress用QQ头像代替没有Gravatar头像

因为好多人在问我WordPress头像能不能用QQ头像替代，答案是可以对于没有Gravatar的人，用QQ头像代替Gravatar的，今天就发布在盒子萌博客上！具体代码是这样的

user_email;
	} elseif ( 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 = $user->user_email;
		} elseif ( !empty($id_or_email->comment_author_email) ) {
			$email = $id_or_email->comment_author_email;
		}
	} else {
		$email = $id_or_email;
	}

	// Get the url of avatar
	$pattern = '/(?=http)[-w:/.?=]+/';
	$url_count = preg_match_all($pattern, $avatar, $original_avatar_url);
	$avatar_size = array();
	$avatar_url = array();
	$pattern = '/(? $lifetime) { 
			// If the file doesn't exist or it has been out of date, then update it.
			// It's necessary to use "-N --no-use-server-timestamps".
			exec("wget -N --no-use-server-timestamps -O '" . $file_path . "' '" . $avatar_url[$i] . "'  > /dev/null &");						
		}
		else $avatar = str_replace($original_avatar_url[0][$i], $wp_url . '/avatar/' . $hashkey . '-' . $avatar_size[$i] . '.jpg', $avatar);
		if ( filesize($file_path) 

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