접속자수를 iframe 이용해 넣을려고 하는데요

connect.php 

<?php
include_once('./_common.php');
include_once(G5_PATH.'/head.sub.php');
include_once(G5_LIB_PATH.'/content.lib.php');
echo connect('basic'); // 접속자집계
?>   

html 

<iframe src="/g5/connect.php" scrolling="no" frameborder="0" width="100%" height="40px" allowTransparency="true" title="접속자수"></iframe>  

오류

​Warning: include_once(/host/home2/smboakty7/html/g5/lib/content.lib.php): failed to open stream: No such file or directory in /host/home2/smboakty7/html/g5/connect.php on line 4 Warning: include_once(): Failed opening '/host/home2/smboakty7/html/g5/lib/content.lib.php' for inclusion (include_path='.:/usr/share/pear:/usr/share/php') in /host/home2/smboakty7/html/g5/connect.php on line 4 Fatal error: Call to undefined function connect() in /host/home2/smboakty7/html/g5/connect.php on line 5

이렇게 하는게 맞을까요 ?

오류가 뜨드라구요.