join应用！

 1 $key = array();
 2    $val = array();
 3    foreach ($_POST as $k=>$v)
 4    {
 5     $key[] = '`'.strip_tags(mysql_real_escape_string(trim($k))).'`';
 6     $val[] = "'".strip_tags(mysql_real_escape_string(trim($v)))."'";
 7    }
 8    
 9    $keys = join(",",$key);
10    $vals = join(",",$val);