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Alt文字的重要性

Alt文字是在网页上使用的一种描述图像的文本。虽然对于人类用户来说可能看不出差别，但对于搜索引擎、屏幕阅读器和视力障碍用户来说，它具有重要意义。首先，搜索引擎使用Alt文字了解图像内容并确定网页的相关性。如果没有Alt文字，搜索引擎将无法识别图像，并且可能会将网页排名降低。其次，屏幕阅读器可以使用Alt文字来解释图像信息。对于视力障碍的用户来说，Alt文字是他们理解图像内容的唯一途径。如果没有Alt文字，他们将无法获得这些信息。因此，Alt文字对于确保网页内容的可用性和可访问性至关重要，无论是对于搜索引擎优化还是对于视力障碍用户而言。

Public @ 2023-06-25 08:00:09

死链包括协议死链和内容死链两种形式

协议死链：指页面的TCP协议或者HTTP协议状态明确表示的死链，我们常见的404、403、503就属于协议死链；内容死链：指服务器返回状态是正常的，但是网页内容已经变更为不存在、已删除或需要权限等与网站原内容无关的信息页面。

Public @ 2016-03-17 15:56:21

什么是死链

我们在打开网址时，有时会出现“访问的页面不存在”的提示，这是死链的一种最直白的表现方式：通过某个链接进来后发现打不开或者是404页面，那么这个链接就叫做死链。

Public @ 2023-01-12 15:56:21

Alt标签和Title标签的区别在和使用讲解

Alt标签和Title标签是两种不同的HTML标签，用于提供附加信息和描述图片和链接。它们的区别和用法可以如下解释： 1. Alt标签： - Alt标签（即"alternate text"，替代文本）适用于HTML中的img标签，用于描述图片内容和提供替代文本。 - Alt标签主要是为了辅助视觉障碍人群（如盲人）理解和访问图片内容。 - 当图片无法加载时，浏览器会显示Alt文本，同时搜索引擎也会

Public @ 2023-06-30 23:00:18

Alt文字的重要性

Alt文字是在网页上使用的一种描述图像的文本。虽然对于人类用户来说可能看不出差别，但对于搜索引擎、屏幕阅读器和视力障碍用户来说，它具有重要意义。首先，搜索引擎使用Alt文字了解图像内容并确定网页的相关性。如果没有Alt文字，搜索引擎将无法识别图像，并且可能会将网页排名降低。其次，屏幕阅读器可以使用Alt文字来解释图像信息。对于视力障碍的用户来说，Alt文字是他们理解图像内容的唯一途径。如果

Public @ 2023-06-25 08:00:09

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[ DB ] CONNECT:[ UseTime:0.031171s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.022020s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9401 LIMIT 1 [ RunTime:0.021760s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.021261s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, '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:0.021601s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, '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:0.022028s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9401 LIMIT 1 [ RunTime:0.020991s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=9401 [ RunTime:0.024188s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站页面优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.028214s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站页面优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.039067s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Alt文字' AND `status` <> -1 LIMIT 1 [ RunTime:0.028079s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Alt文字' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.038487s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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