php页面静态化,php页面静态
php页面静态化,php页面静态
如何优化页面响应时间:
- 动态页面静态化
- 优化数据库
- 使用负载均衡
- 使用缓存
如果页面中的一些内容不经常改动,可以使用动态页面静态化。好处是:减少服务器脚本的计算时间;降低服务器的响应时间。
1、动态URL地址设置静态形式(伪静态)
例如:http://xxx.com/index.php?c=play&id=1111 =>
http://xxx.com/play/1111.html (并不是一个纯静态页面)
2、buffer
buffer其实就是缓冲区,一个内存地址空间,主要用于存储数据区域。
编写一个buffer.php文件,并保存,并不是直接将文件内容保存在磁盘里,而是先把内容写入到buffer中,当一个buffer写满的时候,会把buffer中的数据写入到磁盘里,这是操作系统的buffer。
当执行一个PHP程序的时候,如果有输出内容,会先放到输出缓冲区,数据再通过tcp传给客户端或浏览器。
要想数据能够放到输出缓冲区,首先打开输出缓冲,通过php.ini文件output_buffering = On或者ob_start(),然后使用ob_get_contents()获取输出缓冲区内容。
3、PHP实现页面纯静态化
纯静态化的html文件放在服务器端的磁盘。
基本方式:
- file_put_contents()函数;
int file_put_contents ( string $filename
, mixed $data
[, int $flags
= 0 [, resource $context
]] )
成功会返回写入到文件内数据的字节数,失败时返回false。
- 使用PHP内置缓存机制实现页面静态化-output_buffering
ob函数
ob_start(); 打开输出缓冲区
ob_get_contents(void);返回输出缓冲区内容
ob_clean(void);清空输出缓冲区
ob_get_clean(void);得到当前缓冲区的内容并删除当前输出缓冲区
生成纯静态页面的三种方式:
- 页面添加缓存时间
<?<span>php<br />//存在index.html并且在有效时间以内(5分钟) </span><span>if</span> (<span>file_exists</span>('index.html') && (<span>time</span>()-<span>filemtime</span>('index.html') < 300<span>)) { </span><span>require_once</span> 'index.html'<span>; }</span><span>else</span><span>{ </span><span>ob_start</span><span>(); </span><span>//</span><span>连接数据库获取数据并填充到模板</span> <span>echo</span> 'helllo world'<span>; </span><span>file_put_contents</span>('index.html', <span>ob_get_contents</span><span>()); } </span>?>
- 手动触发
后台手动设置,主动生成
- linux crontab 定时扫描程序
crontab -e //编辑某个crontab文件,文件内容如:*/5 * * * * php执行程序所在目录 /xx/xx.php
http://www.cnblogs.com/peida/archive/2013/01/08/2850483.html
4、伪静态
PHP处理伪静态:正则表达式匹配
<span>//</span><span>http://xxx.cn/xx/test4.php/2/11.html //http://xxx.cn/xx/test4.php?page=2&id=1,实际的访问路径</span> <span>if</span>(<span>preg_match</span>('/\/(\d+)\/(\d+).html/', <span>$_SERVER</span>['PATH_INFO'], <span>$matches</span><span>)){ </span><span>$param</span>['page'] = <span>$matches</span>[1<span>]; </span><span>$param</span>['id'] = <span>$matches</span>[2<span>]; }</span>
Apache下rewrite配置:
http://myapps.com/detail/12.html ==> http://myapps.com/apps/detail.php?id=12(实际访问的路径)
httpd.conf文件:开启LoadModule rewrite_module modules/mod_rewrite.so
extra/httpd-vhosts.conf文件 作如下配置:
ServerAdmin webmaster@dummy-host2.example.com
DocumentRoot "D:/wamp/www/myProject"
ServerName myapps.com
ErrorLog "logs/dummy-host2.example.com-error.log"
CustomLog "logs/dummy-host2.example.com-access.log" common
RewriteEngine on
#如果detail目录下有12.html文件,就优先访问该目录下的文件
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-f
RewriteRule ^/detail/([0-9]*).html$ /apps/detail.php?id=$1
http://www.onexin.net/apache-rewrite-detailed/

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