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Summary of commonly used codes

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Release： 2018-06-04 11:36:53
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This time I will bring you a summary of commonly used codes. What are the precautions for using codes? Here are practical cases, let’s take a look.

Required attributes

Attributes Value Description
##content some text Define meta-information related to the http-equiv or name attribute

Optional attributes

##http-equivnamecontent
Properties Value Description
##content-type / expire / refresh / set-cookie Associate the content attribute to the HTTP header.
##author / description / keywords / generator / revised / others Associate the content attribute to a name.
some text Definition is used to translate content The format of the attribute value.

SEO Optimization

Reference Document

  • Page keywords, each web page should have a description A unique set of keywords for the content of this web page.
    Use descriptive and representative keywords and phrases that people are likely to search for, and accurately describe the information provided on the web page. Mark content that is too short and search engines may not consider it relevant. Also tags should not exceed 874 characters. 

<span style="font-size: 14px;"><meta name="keywords" content="your tags" /></span>
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  • Page description, each web page should have a description tag that is no longer than 150 characters and accurately reflects the content of the web page. 

<span style="font-size: 14px;"><meta name="description" content="150 words" /></span>
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  • Search engine indexing method, robotterms is a set of values ​​separated by commas (,), and usually has the following values : none, noindex, nofollow, all, index and follow. Make sure you use the nofollow and noindex attribute values ​​correctly. 

<span style="font-size: 14px;"><meta name="robots" content="index,follow" /><!--<br/>    all：文件将被检索，且页面上的链接可以被查询；<br/>    none：文件将不被检索，且页面上的链接不可以被查询；<br/>    index：文件将被检索；<br/>    follow：页面上的链接可以被查询；<br/>    noindex：文件将不被检索；<br/>    nofollow：页面上的链接不可以被查询。<br/> --></span>
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  • Page redirection and refresh: The number in the content represents the time (seconds), that is, how long it takes to refresh. If you add a URL, it will redirect to the specified web page (search engines can automatically detect it, and it can easily be regarded as misleading by the engine and punished). 

<span style="font-size: 14px;"><meta http-equiv="refresh" content="0;url=" /></span>
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  • Other

<span style="font-size: 14px;"><meta name="author" content="author name" /> <!-- 定义网页作者 --><meta name="google" content="index,follow" /><meta name="googlebot" content="index,follow" /><meta name="verify" content="index,follow" /></span>
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Mobile Device

  • #viewport: can optimize the display of mobile browsers. If the website is not responsive, do not use initial-scale or disable scaling.
    The viewport width of most 4.7-5-inch devices is set to 360px; the 5.5-inch device is set to 400px; the iphone6 ​​is set to 375px; the iphone6 ​​plus is set to 414px. 

<span style="font-size: 14px;"><meta name="viewport" content="width=device-width, initial-scale=1.0,maximum-scale=1.0, user-scalable=no"/><!-- `width=device-width` 会导致 iPhone 5 添加到主屏后以 WebApp 全屏模式打开页面时出现黑边  --></span>
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  1. width: width (number/device-width) (range 200 to 10,000, default 980 pixels)

  2. height: height (number/device-height) (range from 223 to 10,000)

  3. initial-scale: initial scaling (ranging from >0 to 10)

  4. minimum-scale：允许用户缩放到的最小比例

  5. maximum-scale：允许用户缩放到的最大比例

  6. user-scalable：用户是否可以手动缩 (no,yes)

  7. minimal-ui：可以在页面加载时最小化上下状态栏。（已弃用）

注意，很多人使用initial-scale=1到非响应式网站上，这会让网站以100%宽度渲染，用户需要手动移动页面或者缩放。如果和initial-scale=1同时使用user-scalable=no或maximum-scale=1，则用户将不能放大/缩小网页来看到全部的内容。

  • WebApp全屏模式：伪装app，离线应用。

<span style="font-size: 14px;"><meta name="apple-mobile-web-app-capable" content="yes" /> <!-- 启用 WebApp 全屏模式 --></span>
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  • 隐藏状态栏/设置状态栏颜色：只有在开启WebApp全屏模式时才生效。content的值为default | black | black-translucent 。

<span style="font-size: 14px;"><meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" /></span>
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  • 添加到主屏后的标题

<span style="font-size: 14px;"><meta name="apple-mobile-web-app-title" content="标题"></span>
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  • 忽略数字自动识别为电话号码

<span style="font-size: 14px;"><meta content="telephone=no" name="format-detection" /> </span>
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  • 忽略识别邮箱

<span style="font-size: 14px;"><meta content="email=no" name="format-detection" /></span>
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  • 添加智能 App 广告条 Smart App Banner：告诉浏览器这个网站对应的app，并在页面上显示下载banner

<span style="font-size: 14px;"><meta name="apple-itunes-app" content="app-id=myAppStoreID, affiliate-data=myAffiliateData, app-argument=myURL"> </span>
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  • 其他 参考文档

<span style="font-size: 14px;"><!-- 针对手持设备优化，主要是针对一些老的不识别viewport的浏览器，比如黑莓 --><meta name="HandheldFriendly" content="true"><!-- 微软的老式浏览器 --><meta name="MobileOptimized" content="320"><!-- uc强制竖屏 --><meta name="screen-orientation" content="portrait"><!-- QQ强制竖屏 --><meta name="x5-orientation" content="portrait"><!-- UC强制全屏 --><meta name="full-screen" content="yes"><!-- QQ强制全屏 --><meta name="x5-fullscreen" content="true"><!-- UC应用模式 --><meta name="browsermode" content="application"><!-- QQ应用模式 --><meta name="x5-page-mode" content="app"><!-- windows phone 点击无高光 --><meta name="msapplication-tap-highlight" content="no"></span>
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网页相关

  • 申明编码

<span style="font-size: 14px;"><meta charset=&#39;utf-8&#39; /></span>
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  • 优先使用 IE 最新版本和 Chrome

<span style="font-size: 14px;"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /><!-- 关于X-UA-Compatible --><meta http-equiv="X-UA-Compatible" content="IE=6" ><!-- 使用IE6 --><meta http-equiv="X-UA-Compatible" content="IE=7" ><!-- 使用IE7 --><meta http-equiv="X-UA-Compatible" content="IE=8" ><!-- 使用IE8 --></span>
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  • 浏览器内核控制：国内浏览器很多都是双内核（webkit和Trident），webkit内核高速浏览，IE内核兼容网页和旧版网站。而添加meta标签的网站可以控制浏览器选择何种内核渲染。参考文档

<span style="font-size: 14px;"> <meta name="renderer" content="webkit|ie-comp|ie-stand"></span>
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国内双核浏览器默认内核模式如下：
1. 搜狗高速浏览器、QQ浏览器：IE内核（兼容模式）
2. 360极速浏览器、遨游浏览器：Webkit内核（极速模式）

  • 禁止浏览器从本地计算机的缓存中访问页面内容：这样设定，访问者将无法脱机浏览。

<span style="font-size: 14px;"><meta http-equiv="Pragma" content="no-cache"></span>
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  • Windows 8

<span style="font-size: 14px;"><meta name="msapplication-TileColor" content="#000"/> <!-- Windows 8 磁贴颜色 --><meta name="msapplication-TileImage" content="icon.png"/> <!-- Windows 8 磁贴图标 --></span>
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  • 站点适配：主要用于PC-手机页的对应关系。

<span style="font-size: 14px;"><meta name="mobile-agent"content="format=[wml|xhtml|html5]; url=url"><!--<br/>[wml|xhtml|html5]根据手机页的协议语言，选择其中一种；<br/>url="url" 后者代表当前PC页所对应的手机页URL，两者必须是一一对应关系。<br/> --></span>
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  • 转码申明：用百度打开网页可能会对其进行转码（比如贴广告），避免转码可添加如下meta

<span style="font-size: 14px;"><meta http-equiv="Cache-Control" content="no-siteapp" /></span>
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相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！

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