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<title><![CDATA[向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除]]></title> 
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<copyright><![CDATA[向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除]]></copyright>
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<title><![CDATA[php中使用header函数的http头设置及定时刷新页面]]></title> 
<author>jack &lt;xdy108@126.com&gt;</author>
<category><![CDATA[WEB2.0]]></category>
<pubDate>Thu, 29 Oct 2009 01:59:12 +0000</pubDate> 
<guid>http://jackxiang.com/post//</guid> 
<description>
<![CDATA[ 
	php定时刷新页面<br/>很简单就这一句：header(“Refresh: 5″); 5代表5秒刷新一次。<br/><br/>但注意：在header()之前不能有任何输出。<br/><br/>网页的缓存是由HTTP消息头中的“Cache-control”来控制的，常见的取值有private、no-cache、max-age、must-revalidate等，默认为private。其作用根据不同的重新浏览方式分为以下几种情况：<br/><br/><br/>（1） 打开新窗口<br/>值为private、no-cache、must-revalidate，那么打开新窗口访问时都会重新访问服务器。<br/>而如果指定了max-age值，那么在此值内的时间里就不会重新访问服务器，例如：<br/>Cache-control: max-age=5(表示当访问此网页后的5秒内再次访问不会去服务器)<br/><br/>（2） 在地址栏回车<br/>值为private或must-revalidate则只有第一次访问时会访问服务器，以后就不再访问。<br/>值为no-cache，那么每次都会访问。<br/>值为max-age，则在过期之前不会重复访问。<br/><br/>（3） 按后退按扭<br/>值为private、must-revalidate、max-age，则不会重访问，<br/>值为no-cache，则每次都重复访问<br/><br/>（4） 按刷新按扭<br/>无论为何值，都会重复访问<br/><br/>Cache-control值为“no-cache”时，访问此页面不会在Internet临时文章夹留下页面备份。<br/><br/>另外，通过指定“Expires”值也会影响到缓存。例如，指定Expires值为一个早已过去的时间，那么访问此网时若重复在地址栏按回车，那么每次都会重复访问： Expires: Fri, 31 Dec 1999 16:00:00 GMT<br/><br/>比如：禁止页面在IE中缓存<br/><br/>http响应消息头部设置：<br/><br/>CacheControl = no-cache<br/>Pragma=no-cache<br/>Expires = -1<br/><br/>Expires是个好东东，如果服务器上的网页经常变化，就把它设置为-1，表示立即过期。如果一个网页每天凌晨1点更新，可以把Expires设置为第二天的凌晨1点。<br/><br/>当HTTP1.1服务器指定CacheControl = no-cache时，浏览器就不会缓存该网页。<br/><br/>旧式 HTTP 1.0 服务器不能使用 Cache-Control 标题。<br/>所以为了向后兼容 HTTP 1.0 服务器，IE使用Pragma:no-cache 标题对 HTTP 提供特殊支持。<br/>如果客户端通过安全连接 (https://)与服务器通讯，且服务器在响应中返回 Pragma:no-cache 标题，<br/>则 Internet Explorer不会缓存此响应。注意：Pragma:no-cache 仅当在安全连接中使用时才防止缓存，如果在非安全页中使用，处理方式与 Expires:-1相同，该页将被缓存，但被标记为立即过期<br/>header常用指令<br/>header分为三部分：<br/>第一部分为HTTP协议的版本(HTTP-Version)；<br/>第二部分为状态代码(Status)；<br/>第三部分为原因短语(Reason-Phrase)。<br/><br/>// fix 404 pages: 用这个header指令来解决URL重写产生的404 header<br/><br/><div class="code">&lt;?php<br/>header(’HTTP/1.1 200 OK’);<br/><br/>// set 404 header: 页面没找到<br/>header(’HTTP/1.1 404 Not Found’);<br/><br/>//页面被永久删除，可以告诉搜索引擎更新它们的urls<br/>// set Moved Permanently header (good for redrictions)<br/>// use with location header<br/>header(’HTTP/1.1 301 Moved Permanently’);<br/><br/>// 访问受限<br/>header(’HTTP/1.1 403 Forbidden’);<br/><br/>// 服务器错误<br/>header(’HTTP/1.1 500 Internal Server Error’);<br/><br/>// 重定向到一个新的位置<br/>// redirect to a new location:<br/>header(’Location: http://www.example.org/‘);<br/><br/>延迟一段时间后重定向<br/>// redrict with delay:<br/>header(’Refresh: 10; url=http://www.example.org/’);<br/>print ‘You will be redirected in 10 seconds’;<br/><br/>// 覆盖 X-Powered-By value<br/>// override X-Powered-By: PHP:<br/>header(’X-Powered-By: PHP/4.4.0′);<br/>header(’X-Powered-By: Brain/0.6b’);<br/><br/>// 内容语言 (en = English)<br/>// content language (en = English)<br/>header(’Content-language: en’);<br/><br/>//最后修改时间(在缓存的时候可以用到)<br/>// last modified (good for caching)<br/>$time = time() – 60; // or filemtime($fn), etc<br/>header(’Last-Modified: ‘.gmdate(’D, d M Y H:i:s’, $time).’ GMT’);<br/><br/>// 告诉浏览器要获取的内容还没有更新<br/>// header for telling the browser that the content<br/>// did not get changed<br/>header(’HTTP/1.1 304 Not Modified’);<br/><br/>// 设置内容的长度 (缓存的时候可以用到):<br/>// set content length (good for caching):<br/>header(’Content-Length: 1234′);<br/><br/>// 用来下载文件:<br/>// Headers for an download:<br/>header(’Content-Type: application/octet-stream’);<br/>header(’Content-Dis; filename=”example.zip”‘);<br/>header(’Content-Transfer-Encoding: binary’);<br/><br/>// 禁止缓存当前文档:<br/>// load the file to send:readfile(’example.zip’);<br/>// Disable caching of the current document:<br/>header(’Cache-Control: no-cache, no-store, max-age=0, must-revalidate’);<br/>header(’Expires: Mon, 26 Jul 1997 05:00:00 GMT’);<br/><br/>// 设置内容类型:<br/>// Date in the pastheader(’Pragma: no-cache’);<br/>// set content type:<br/>header(’Content-Type: text/html; charset=iso-8859-1′);<br/>header(’Content-Type: text/html; charset=utf-8′);<br/>header(’Content-Type: text/plain’);<br/><br/>// plain text file<br/>header(’Content-Type: image/jpeg’);<br/><br/>// JPG picture<br/>header(’Content-Type: application/zip’);<br/><br/>// ZIP file<br/>header(’Content-Type: application/pdf’);<br/><br/>// PDF file<br/>header(’Content-Type: audio/mpeg’);<br/><br/>// Audio MPEG (MP3,…) file<br/>header(’Content-Type: application/x-shockwave-flash’);<br/><br/>// 显示登录对话框，可以用来进行HTTP认证<br/>// Flash animation// show sign in box<br/>header(’HTTP/1.1 401 Unauthorized’);<br/>header(’WWW-Authenticate: Basic realm=”Top Secret”‘);<br/>print ‘Text that will be displayed if the user hits cancel or ‘;<br/>print ‘enters wrong login data’;<br/><br/>?&gt;</div><br/>附上type ：<br/><br/><br/><div class="code">&lt;?php<br/><br/>$mimetypes = array(<br/><br/>&#039;ez&#039; =&gt; &#039;application/andrew-inset&#039;,<br/><br/>&#039;hqx&#039; =&gt; &#039;application/mac-binhex40&#039;,<br/><br/>&#039;cpt&#039; =&gt; &#039;application/mac-compactpro&#039;,<br/><br/>&#039;doc&#039; =&gt; &#039;application/msword&#039;,<br/><br/>&#039;bin&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;dms&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;lha&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;lzh&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;exe&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;class&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;so&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;dll&#039; =&gt; &#039;application/octet-stream&#039;,<br/><br/>&#039;oda&#039; =&gt; &#039;application/oda&#039;,<br/><br/>&#039;pdf&#039; =&gt; &#039;application/pdf&#039;,<br/><br/>&#039;ai&#039; =&gt; &#039;application/postscript&#039;,<br/><br/>&#039;eps&#039; =&gt; &#039;application/postscript&#039;,<br/><br/>&#039;ps&#039; =&gt; &#039;application/postscript&#039;,<br/><br/>&#039;smi&#039; =&gt; &#039;application/smil&#039;,<br/><br/>&#039;smil&#039; =&gt; &#039;application/smil&#039;,<br/><br/>&#039;mif&#039; =&gt; &#039;application/vnd.mif&#039;,<br/><br/>&#039;xls&#039; =&gt; &#039;application/vnd.ms-excel&#039;,<br/><br/>&#039;ppt&#039; =&gt; &#039;application/vnd.ms-powerpoint&#039;,<br/><br/>&#039;wbxml&#039; =&gt; &#039;application/vnd.wap.wbxml&#039;,<br/><br/>&#039;wmlc&#039; =&gt; &#039;application/vnd.wap.wmlc&#039;,<br/><br/>&#039;wmlsc&#039; =&gt; &#039;application/vnd.wap.wmlscriptc&#039;,<br/><br/>&#039;bcpio&#039; =&gt; &#039;application/x-bcpio&#039;,<br/><br/>&#039;vcd&#039; =&gt; &#039;application/x-cdlink&#039;,<br/><br/>&#039;pgn&#039; =&gt; &#039;application/x-chess-pgn&#039;,<br/><br/>&#039;cpio&#039; =&gt; &#039;application/x-cpio&#039;,<br/><br/>&#039;csh&#039; =&gt; &#039;application/x-csh&#039;,<br/><br/>&#039;dcr&#039; =&gt; &#039;application/x-director&#039;,<br/><br/>&#039;dir&#039; =&gt; &#039;application/x-director&#039;,<br/><br/>&#039;dxr&#039; =&gt; &#039;application/x-director&#039;,<br/><br/>&#039;dvi&#039; =&gt; &#039;application/x-dvi&#039;,<br/><br/>&#039;spl&#039; =&gt; &#039;application/x-futuresplash&#039;,<br/><br/>&#039;gtar&#039; =&gt; &#039;application/x-gtar&#039;,<br/><br/>&#039;hdf&#039; =&gt; &#039;application/x-hdf&#039;,<br/><br/>&#039;js&#039; =&gt; &#039;application/x-javascript&#039;,<br/><br/>&#039;skp&#039; =&gt; &#039;application/x-koan&#039;,<br/><br/>&#039;skd&#039; =&gt; &#039;application/x-koan&#039;,<br/><br/>&#039;skt&#039; =&gt; &#039;application/x-koan&#039;,<br/><br/>&#039;skm&#039; =&gt; &#039;application/x-koan&#039;,<br/><br/>&#039;latex&#039; =&gt; &#039;application/x-latex&#039;,<br/><br/>&#039;nc&#039; =&gt; &#039;application/x-netcdf&#039;,<br/><br/>&#039;cdf&#039; =&gt; &#039;application/x-netcdf&#039;,<br/><br/>&#039;sh&#039; =&gt; &#039;application/x-sh&#039;,<br/><br/>&#039;shar&#039; =&gt; &#039;application/x-shar&#039;,<br/><br/>&#039;swf&#039; =&gt; &#039;application/x-shockwave-flash&#039;,<br/><br/>&#039;sit&#039; =&gt; &#039;application/x-stuffit&#039;,<br/><br/>&#039;sv4cpio&#039; =&gt; &#039;application/x-sv4cpio&#039;,<br/><br/>&#039;sv4crc&#039; =&gt; &#039;application/x-sv4crc&#039;,<br/><br/>&#039;tar&#039; =&gt; &#039;application/x-tar&#039;,<br/><br/>&#039;tcl&#039; =&gt; &#039;application/x-tcl&#039;,<br/><br/>&#039;tex&#039; =&gt; &#039;application/x-tex&#039;,<br/><br/>&#039;texinfo&#039; =&gt; &#039;application/x-texinfo&#039;,<br/><br/>&#039;texi&#039; =&gt; &#039;application/x-texinfo&#039;,<br/><br/>&#039;t&#039; =&gt; &#039;application/x-troff&#039;,<br/><br/>&#039;tr&#039; =&gt; &#039;application/x-troff&#039;,<br/><br/>&#039;roff&#039; =&gt; &#039;application/x-troff&#039;,<br/><br/>&#039;man&#039; =&gt; &#039;application/x-troff-man&#039;,<br/><br/>&#039;me&#039; =&gt; &#039;application/x-troff-me&#039;,<br/><br/>&#039;ms&#039; =&gt; &#039;application/x-troff-ms&#039;,<br/><br/>&#039;ustar&#039; =&gt; &#039;application/x-ustar&#039;,<br/><br/>&#039;src&#039; =&gt; &#039;application/x-wais-source&#039;,<br/><br/>&#039;xhtml&#039; =&gt; &#039;application/xhtml+xml&#039;,<br/><br/>&#039;xht&#039; =&gt; &#039;application/xhtml+xml&#039;,<br/><br/>&#039;zip&#039; =&gt; &#039;application/zip&#039;,<br/><br/>&#039;au&#039; =&gt; &#039;audio/basic&#039;,<br/><br/>&#039;snd&#039; =&gt; &#039;audio/basic&#039;,<br/><br/>&#039;mid&#039; =&gt; &#039;audio/midi&#039;,<br/><br/>&#039;midi&#039; =&gt; &#039;audio/midi&#039;,<br/><br/>&#039;kar&#039; =&gt; &#039;audio/midi&#039;,<br/><br/>&#039;mpga&#039; =&gt; &#039;audio/mpeg&#039;,<br/><br/>&#039;mp2&#039; =&gt; &#039;audio/mpeg&#039;,<br/><br/>&#039;mp3&#039; =&gt; &#039;audio/mpeg&#039;,<br/><br/>&#039;aif&#039; =&gt; &#039;audio/x-aiff&#039;,<br/><br/>&#039;aiff&#039; =&gt; &#039;audio/x-aiff&#039;,<br/><br/>&#039;aifc&#039; =&gt; &#039;audio/x-aiff&#039;,<br/><br/>&#039;m3u&#039; =&gt; &#039;audio/x-mpegurl&#039;,<br/><br/>&#039;ram&#039; =&gt; &#039;audio/x-pn-realaudio&#039;,<br/><br/>&#039;rm&#039; =&gt; &#039;audio/x-pn-realaudio&#039;,<br/><br/>&#039;rpm&#039; =&gt; &#039;audio/x-pn-realaudio-plugin&#039;,<br/><br/>&#039;ra&#039; =&gt; &#039;audio/x-realaudio&#039;,<br/><br/>&#039;wav&#039; =&gt; &#039;audio/x-wav&#039;,<br/><br/>&#039;pdb&#039; =&gt; &#039;chemical/x-pdb&#039;,<br/><br/>&#039;xyz&#039; =&gt; &#039;chemical/x-xyz&#039;,<br/><br/>&#039;bmp&#039; =&gt; &#039;image/bmp&#039;,<br/><br/>&#039;gif&#039; =&gt; &#039;image/gif&#039;,<br/><br/>&#039;ief&#039; =&gt; &#039;image/ief&#039;,<br/><br/>&#039;jpeg&#039; =&gt; &#039;image/jpeg&#039;,<br/><br/>&#039;jpg&#039; =&gt; &#039;image/jpeg&#039;,<br/><br/>&#039;jpe&#039; =&gt; &#039;image/jpeg&#039;,<br/><br/>&#039;png&#039; =&gt; &#039;image/png&#039;,<br/><br/>&#039;tiff&#039; =&gt; &#039;image/tiff&#039;,<br/><br/>&#039;tif&#039; =&gt; &#039;image/tiff&#039;,<br/><br/>&#039;djvu&#039; =&gt; &#039;image/vnd.djvu&#039;,<br/><br/>&#039;djv&#039; =&gt; &#039;image/vnd.djvu&#039;,<br/><br/>&#039;wbmp&#039; =&gt; &#039;image/vnd.wap.wbmp&#039;,<br/><br/>&#039;ras&#039; =&gt; &#039;image/x-cmu-raster&#039;,<br/><br/>&#039;pnm&#039; =&gt; &#039;image/x-portable-anymap&#039;,<br/><br/>&#039;pbm&#039; =&gt; &#039;image/x-portable-bitmap&#039;,<br/><br/>&#039;pgm&#039; =&gt; &#039;image/x-portable-graymap&#039;,<br/><br/>&#039;ppm&#039; =&gt; &#039;image/x-portable-pixmap&#039;,<br/><br/>&#039;rgb&#039; =&gt; &#039;image/x-rgb&#039;,<br/><br/>&#039;xbm&#039; =&gt; &#039;image/x-xbitmap&#039;,<br/><br/>&#039;xpm&#039; =&gt; &#039;image/x-xpixmap&#039;,<br/><br/>&#039;xwd&#039; =&gt; &#039;image/x-xwindowdump&#039;,<br/><br/>&#039;igs&#039; =&gt; &#039;model/iges&#039;,<br/><br/>&#039;iges&#039; =&gt; &#039;model/iges&#039;,<br/><br/>&#039;msh&#039; =&gt; &#039;model/mesh&#039;,<br/><br/>&#039;mesh&#039; =&gt; &#039;model/mesh&#039;,<br/><br/>&#039;silo&#039; =&gt; &#039;model/mesh&#039;,<br/><br/>&#039;wrl&#039; =&gt; &#039;model/vrml&#039;,<br/><br/>&#039;vrml&#039; =&gt; &#039;model/vrml&#039;,<br/><br/>&#039;css&#039; =&gt; &#039;text/css&#039;,<br/><br/>&#039;html&#039; =&gt; &#039;text/html&#039;,<br/><br/>&#039;htm&#039; =&gt; &#039;text/html&#039;,<br/><br/>&#039;asc&#039; =&gt; &#039;text/plain&#039;,<br/><br/>&#039;txt&#039; =&gt; &#039;text/plain&#039;,<br/><br/>&#039;rtx&#039; =&gt; &#039;text/richtext&#039;,<br/><br/>&#039;rtf&#039; =&gt; &#039;text/rtf&#039;,<br/><br/>&#039;sgml&#039; =&gt; &#039;text/sgml&#039;,<br/><br/>&#039;sgm&#039; =&gt; &#039;text/sgml&#039;,<br/><br/>&#039;tsv&#039; =&gt; &#039;text/tab-separated-values&#039;,<br/><br/>&#039;wml&#039; =&gt; &#039;text/vnd.wap.wml&#039;,<br/><br/>&#039;wmls&#039; =&gt; &#039;text/vnd.wap.wmlscript&#039;,<br/><br/>&#039;etx&#039; =&gt; &#039;text/x-setext&#039;,<br/><br/>&#039;xsl&#039; =&gt; &#039;text/xml&#039;,<br/><br/>&#039;xml&#039; =&gt; &#039;text/xml&#039;,<br/><br/>&#039;mpeg&#039; =&gt; &#039;video/mpeg&#039;,<br/><br/>&#039;mpg&#039; =&gt; &#039;video/mpeg&#039;,<br/><br/>&#039;mpe&#039; =&gt; &#039;video/mpeg&#039;,<br/><br/>&#039;qt&#039; =&gt; &#039;video/quicktime&#039;,<br/><br/>&#039;mov&#039; =&gt; &#039;video/quicktime&#039;,<br/><br/>&#039;mxu&#039; =&gt; &#039;video/vnd.mpegurl&#039;,<br/><br/>&#039;avi&#039; =&gt; &#039;video/x-msvideo&#039;,<br/><br/>&#039;movie&#039; =&gt; &#039;video/x-sgi-movie&#039;,<br/><br/>&#039;ice&#039; =&gt; &#039;x-conference/x-cooltalk&#039;,<br/><br/>);<br/>?&gt;</div><br/><br/><br/>
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<title><![CDATA[[评论] php中使用header函数的http头设置及定时刷新页面]]></title> 
<author> &lt;user@domain.com&gt;</author>
<category><![CDATA[评论]]></category>
<pubDate>Thu, 01 Jan 1970 00:00:00 +0000</pubDate> 
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