书上的内容，然后已经建立了数据库和login.php文件。
<?php require_once 'login.php'; $db_server = mysql_connect($db_hostname,$db_username,$db_password); if(!$db_server)die("Unable to connect to MySQL:".mysql_error()); mysql_select_db($db_database) or die("Unable to select to MySQL:".mysql_error()); if(isset($_post['delete']) && isset($_POST['isbn'])) { $isbn = get_post('isbn'); $query = "DELETE FROM classics WHERE isbn='$isbn'"; if(!mysql_query($query, $db_server)) echo "DELETE failed: $query
".mysql_error()."
"; } if(isset($_post['author']) && isset($_post['title']) && isset($_post['category']) && isset($_post['year']) && isset($_post['isbn'])) { $author = get_post('author'); $title = get_post('title'); $category = get_post('category'); $year = get_post('year'); $isbn = get_post('isbn'); $query = "INSERT INTO classics VALUES". "('$author','$title','$category','$year','$isbn')"; if(!mysql_query($query, $db_server)) { echo "INSERT failed: $query
".mysql_error()."
"; } } echo <<<_END _END; $query = "SELECT * FROM classics"; $result = mysql_query($query); if(!$result) die("Datebase access failed: ".mysql_error); $rows = mysql_num_rows($result); for($j = 0; $j<$rows; ++$j) { $row = mysql_fetch_row($result); echo <<<_END Author $row[0] Title $row[1] category $row[2] year $row[3] ISBN $row[4]_END; } mysql_close($db_server); function get_post($var) { return mysql_real_escape_string($_POST[$var]); }?>
该网页显示正常，但是一按ADD RECODE按钮就会出现Object Not Found错误，并且底下有Error 404。
求大神帮忙呢。。。
回复讨论(解决方案)
加断点一步一步调试。