如何调试、排错zen cart网店（出现空白页面）？

[carter]

如以这段错误提示说明哪里的问题：（我只动了inculde/modules下的文件）
Notice: Undefined index: seo_urls in /home4/chrisuq1/public_html/includes/functions/html_output.php on line 24

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Constant OFFICE_IP_TO_HOST_ADDRESS already defined in /home4/chrisuq1/public_html/includes/languages/english/email_extras.php on line 52

Notice: Constant PRODUCT_NAME_1 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 1

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Constant CATEGORY_NAME_1 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 1

Notice: Constant CATEGORY_NAME_2 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 2

Notice: Constant CATEGORY_NAME_3 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 3

Notice: Constant CATEGORY_NAME_4 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 4

Notice: Constant CATEGORY_NAME_5 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 5

Notice: Constant CATEGORY_NAME_6 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 6

Notice: Constant CATEGORY_NAME_7 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 7

Notice: Constant CATEGORY_NAME_8 already defined in /home4/chrisuq1/public_html/includes/classes/seo.url.php(1068) : eval()'d code on line 8

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Undefined property: SEO_URL::$keep_in_memory in /home4/chrisuq1/public_html/includes/classes/seo.url.php on line 1082

Notice: Undefined variable: robotsNoIndex in /home4/chrisuq1/public_html/includes/templates/template_default/common/html_header.php on line 31

[carter]

上面的那么多URL出错，我已经在后台关了 优化，怎么还那样。
另外还有的错误是以下列出的，好象是说不知道featured_products， new products 的ID， 我数据库也恢复到原来没有出错时的啊。
Notice: Undefined index: music_genre_id in /home4/chrisuq1/public_html/includes/modules/featured_products.php on line 21

Notice: Undefined index: record_company_id in /home4/chrisuq1/public_html/includes/modules/featured_products.php on line 21

Notice: Undefined index: music_genre_id in /home4/chrisuq1/public_html/includes/modules/specials_index.php on line 21

Notice: Undefined index: record_company_id in /home4/chrisuq1/public_html/includes/modules/specials_index.php on line 21

Notice: Undefined index: music_genre_id in /home4/chrisuq1/public_html/includes/modules/upcoming_products.php on line 24

Notice: Undefined index: record_company_id in /home4/chrisuq1/public_html/includes/modules/upcoming_products.php on line 24

[Jack]

"Notice:" 的全部可以忽略，关闭错误提示就不显示了。

重点查看页面最后出现的 “Fatal” 字样

[kin668]

我用的是国外空间，开始时候是装了中文版的，很多地方都出现空白页，不过重装了一个英文版后，一点事都没有，不知道是为什么了？

[denzyxie]

首页空白，排错出现以下错误，请高手帮忙解决，急！
Fatal error: require() [function.require]: Failed opening required 'includes/modules/meta_tags.php' (include_path='.:/usr/local/php5/lib/php') in /home/ehoting1/public_html/includes/templates/pure_blue/common/html_header.php on line 16

[Jack]

少了 /includes/modules/meta_tags.php 这个文件

[bertlin]

登录后出现空白页,错误提示:
Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent in /home/yc42cn/public_html/hair/includes/functions/sessions.php on line 167

Warning: Cannot modify header information - headers already sent by (output started at /home/yc42cn/public_html/hair/includes/languages/schinese/extra_definitions/google_side_ads.php:1) in /home/yc42cn/public_html/hair/includes/functions/functions_general.php on line 44

[Jack]

/includes/languages/schinese/extra_definitions/google_side_ads.php 出错了

[bertlin]

我重新安装过了，是我用的模板的问题。那个模板的用户登录不了，提示安全错误。不用那个模板就没事。

[Jack]

安全错误的原因论坛上有贴子，搜索下