html5叫板flash，革命在即？

2010年4月30日，对it行业来说是一个特别的日子，因为这一天苹果ceo乔布斯宣布iOS弃Flash，在iphone新版设备上将不再对flash提供支持，将用html5技术来代替。ios将全面采用HTML5的消息传出后，微软也力挺乔布斯，称Flash落后。乔布斯封杀Flash的理由是：Flash不适合触摸设备，技术封闭且落后。而HTML5可以通过代码实现Flash视频播放技术，且支持Canvas画布功能。所以就长远的发展来讲。用户会慢慢接受html5技术。

这枚消息无异于重磅炸弹。消息一出，不止震惊了it业界人士，同样还波及到普通用户。根据相关机构调查Flash Player的市场份额将近98%，普及率高，受众广。苹果公司在2010年相继推出iPhone 4与iPad，因外观时尚、灵动、便携而广受欢迎，而iOS封杀Flash的举动，也让用户与开发者重新对HTML5有了初步了解。在iTunes商店中的应用不见Flash，让那些基于Flash技术的游戏编写者不得不更换为HTML5。事实证明,HTML5在iOS平台深受好评，但有些用户还是希望能出现一款具备Flash特色的iOS游戏。

有了苹果、谷歌这2大互联网巨头的力挺，HTML5开始解开它神秘面纱，可谓众星捧月，迅速受到与开发者的垂青。谷歌、苹果都赞其为网络标准新生力军；连一向喜好特立独行的微软，也悄然在Internet Explorer 9 中加入对HTML5的大量支持（IE10的HTML5得分更高于IE9），今年微软的开发者大会上不仅推出了Windows 8，同时还宣布将取消Metro界面下Flash支持。那么Flash是否会被HTML5搞死？或是与HTML5并存而生？处于尴尬位置的Adobe，将采用什么手段与HTML5抗衡？

简单了解一下HTML5：　　

根据维基百科上的解释，HTML5的前身是Web Applications1.0，源自于WHATWG。
2007年，它被互联网联盟W3C接纳。HTML 5与HTML 4的不同之处　　
增加新的元素：section, video, progress, nav, meter, time, aside, canvas　　
input元素的新属性：日期和时间，email, url　　
新的通用属性：ping, charset, async　　
全域属性：id, tabindex, repeat　　
移除元素：center, font, u, strike, s, frameset, frame, applet

HTML 5技术优势　　

据一位参与html5标准制定的开发者说，“HTML5与Flash在功能上并不完全重叠的，比如对于摄像头等计算机硬件的调用，仍然只能使用Flash或其他方法实现”。
但HTML5引入了一些足以让Flash致命的元素，最致命的两个标签：canvas与video。　　
一旦新网络标准只采纳HTML5的Video，这将导致我们所登录的视频网站统一放弃Flash Video(FLV)，对flash的市场占有率形成致命冲击。此举将深刻影响到整个互联网，而Canvas也将网络动画与图片载入速度大大提升。希望这次变革能给广大网民带来前所未有的畅快感受。。。

页面Trace信息

当前页面 : /media/201111/76.html
模板缓存 : D:\wwwroot\citycy\wwwroot/data/front/runtime/cache/db7dbc3442b23b64f8546ffe39d13d31.php
请求方法 : GET
通信协议 : HTTP/1.1
请求时间 : 2021-08-05 16:59:40
用户代理 : CCBot/2.0 (https://commoncrawl.org/faq/)
会话ID : elho9i7n7hmh1jke6d8clv5gb3
日志记录 : 61条日志
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead DbMysql.class.php 第 62 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SHOW COLUMNS FROM citycy_category
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT `catid` FROM `citycy_category` WHERE `catdir`='media' LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead functions.php 第 118 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2048] Only variables should be assigned by reference FbaseAction.class.php 第 68 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: forward FbaseAction.class.php 第 69 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead common.php 第 79 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: userdata FbaseAction.class.php 第 105 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: userdata FbaseAction.class.php 第 105 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2048] Declaration of ContentModel::add() should be compatible with Model::add($data = '', $options = Array) ContentModel.class.php 第 507 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2048] Declaration of ContentModel::delete() should be compatible with Model::delete($options = Array) ContentModel.class.php 第 507 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.015625s SQL = SHOW COLUMNS FROM citycy_content
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_escape_string(): This function is deprecated; use mysql_real_escape_string() instead. DbMysql.class.php 第 400 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_escape_string(): This function is deprecated; use mysql_real_escape_string() instead. DbMysql.class.php 第 400 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT `cid` FROM `citycy_content` WHERE ( `url` = '201111/76.html' ) AND ( `status` = '9' ) LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_escape_string(): This function is deprecated; use mysql_real_escape_string() instead. DbMysql.class.php 第 400 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT * FROM `citycy_content` WHERE ( `url` = '201111/76.html' ) LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SHOW COLUMNS FROM citycy_content_article
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_escape_string(): This function is deprecated; use mysql_real_escape_string() instead. DbMysql.class.php 第 400 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT * FROM `citycy_content_article` WHERE ( `cid` = '76' ) LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SHOW COLUMNS FROM citycy_model_field
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT `fieldid` FROM `citycy_model_field` WHERE `status`='1' AND `modelid`='1'
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SHOW COLUMNS FROM citycy_content_tag
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8192] mysql_escape_string(): This function is deprecated; use mysql_real_escape_string() instead. DbMysql.class.php 第 400 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT citycy_tag.name FROM `citycy_content_tag` LEFT JOIN citycy_tag ON (citycy_tag.tagid=citycy_content_tag.tagid) WHERE ( citycy_content_tag.keyid = 'c-76' ) ORDER BY citycy_tag.tagid DESC
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2] Invalid argument supplied for foreach() ContentModel.class.php 第 416 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 199 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2] strpos(): Empty needle ThumbField.class.php 第 21 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: value Field.class.php 第 197 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined index: p FbaseAction.class.php 第 262 行.
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT * FROM `citycy_content` WHERE sort<1 AND catid=12 ORDER BY sort DESC LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] SQL: RunTime:0.000000s SQL = SELECT * FROM `citycy_content` WHERE sort>1 AND catid=12 ORDER BY sort ASC LIMIT 1
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2] Missing argument 1 for Ad::__construct(), called in D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Common\functions.php on line 259 and defined Ad.class.php 第 40 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [2] Missing argument 2 for Ad::__construct(), called in D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Common\functions.php on line 259 and defined Ad.class.php 第 40 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: type Ad.class.php 第 41 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: setting Ad.class.php 第 42 行.
[ 2021-08-05T16:59:40+08:00 ] NOTIC: [8] Undefined variable: html Ad.class.php 第 136 行.
加载文件 : 76
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[10] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Lib\Think\Core\Log.class.php
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[15] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Common\convention.php
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[18] => D:\wwwroot\citycy\wwwroot\data\config.cache.php
[19] => D:\wwwroot\citycy\wwwroot\front\Common\common.php
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[21] => D:\wwwroot\citycy\wwwroot\front\Conf\tags.php
[22] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Common\debug.php
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[24] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Lib\Think\Db\Db.class.php
[25] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Lib\Think\Db\Driver\DbMysql.class.php
[26] => D:\wwwroot\citycy\wwwroot\data\cache\category_12.php
[27] => D:\wwwroot\citycy\wwwroot\include\library\ThinkPHP\Lang\zh-cn.php
[28] => D:\wwwroot\citycy\wwwroot\front\Lib\Action\FcontentAction.class.php
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[35] => D:\wwwroot\citycy\wwwroot\admin\Lib\Model\ContentModel.class.php
[36] => D:\wwwroot\citycy\wwwroot\include\Pager.class.php
[37] => D:\wwwroot\citycy\wwwroot\data\cache\model_1.php
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