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404页面是什么？

404页面是客户端在浏览网页时，服务器无法正常提供信息，或是服务器无法回应，且不知道原因所返回的页面。据说在第三次科技革命之前，互联网的形态就是一个大型的中央数据库，这个数据库就设置在404房间里面。那时候所有的请求都是由人工手动完成的，如果在数据库中没有找到请求者所需要的文件，或者由于请求者写错了文件编号，用户就会得到一个返回信息：room 404 : file not found。404错误信息通常是在目标页面被更改或移除，或客户端输入页面地址错误后显示的页面，人们也就习惯了用404作为服务器未找到文件的错误代码了。当然实际考证传说中的room 404是不存在的，在http请求3位的返回码中，4开头的代表客户错误，5开头代表服务器端错误。

Public @ 2014-05-13 16:11:01

网站链接该如何优化,链接优化方法

网站链接优化是指通过一系列的技术和策略来提高网站链接的质量和数量，从而提高网站在搜索引擎中的排名和流量。以下是一些链接优化方法： 1. 内部链接优化：使用内部链接将网站页面与关键词相关联，提高用户体验和页面权重。 2. 外部链接优化：建立高质量的外部链接，如社交媒体、目录网站和行业论坛等，提高网站的权威度和知名度。 3. 锚文本优化：将目标关键词作为锚文本链接到相关页面，加强关键词的权重和相

Public @ 2023-04-11 00:01:17

提交Sitemap

Sitemap（站点地图）是一种文件，站长可通过该文件列出网站上的网页，将网站内容的组织结构告知搜索引擎。神马等搜索引擎网页抓取工具会读取此文件，以便更加智能地抓取网站内容理想状况下，如果您的网站网页间关联得当，神马的网页抓取工具便能够发现其中的大多数网页。即便如此，提交站点地图仍有助于搜索引擎更加有效地抓取网站，尤其是当网站符合以下某个条件时：1.网站为新建网站且指向该网站的外部链接不多。搜索引

Public @ 2022-11-08 16:09:48

404页面是什么？

404页面是指在网站上访问某个不存在的页面时，服务器返回的错误页面。一般来说，404页面会告诉用户当前访问的页面不存在，并提供一些相关链接或搜索框，帮助用户继续浏览网站。

Public @ 2023-06-06 01:50:05

404页面设置方法

1. 通过服务器配置文件设置404页面可以在服务器配置文件中添加以下代码来设置404页面： ``` ErrorDocument 404 /404.html ``` 在这个例子中，当用户请求一个不存在的页面时，服务器会返回404错误，并重新定向到404.html页面。 2. 使用.htaccess文件设置404页面如果你使用的是 Apache 服务器，可以通过在网站根目录下创建一个.h

Public @ 2023-04-17 13:50:14

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.000325s ] mysql:dbname=briline;host=127.0.0.1;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.000632s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4513 LIMIT 1 [ RunTime:0.000351s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.000508s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.000582s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.000732s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4513 LIMIT 1 [ RunTime:0.000207s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+2 where id=4513 [ RunTime:0.004552s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.005522s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.018180s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海404页面' AND `status` <> -1 LIMIT 1 [ RunTime:0.005360s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海404页面' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.015546s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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