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怎么整站开启php zlib(gzip)压缩输出

Jun 13, 2016 am 10:30 AM
gzip output php zlib

如何整站开启php zlib(gzip)压缩输出

准备工作

  1、找不到php_zlib.dll文件?

  自php4.3开始zlib压缩就已经内置在php中了,所以至少Windows环境下是不需要安装zlib的。

  2、安装搭建php运行环境

  由于光通过php.ini配置文件开启gzip配置实现php gzip压缩输出是不行的的,其需要apache的支持,所以建议安装搭建php+apache+mysql运行环境。

  php gzip配置步骤

  一、打开php.ini配置文件,找到zlib.output_compression = Off,将


?zlib.output_compression = Off
;zlib.output_compression_level = -1

修改为

zlib.output_compression = On
zlib.output_compression_level = 6

php gzip配置知识点:

  1、默认php是不开启zlib整站压缩输出的,而是通过对需要压缩输出的页面使用ob_gzhandler函数实现,两者只能二选一,否则会报错。

  2、zlib.output_compression默认值为Off,你可以将其设置为On,或者output buffer size(默认为4k)

  3、zlib.output_compression_level代表压缩比,默认推荐设置压缩比值为6,可选范围为1-9,-1代表关闭php zlib(gzip)压缩

  二、保存php.ini配置文件,并重启apache服务器

  三、打开apache 配置文件httpd.conf,配置装载deflate_module

  这一步是最关键的开启php gzip压缩输出配置步骤,很多网友会说我已经开启了php.ini配置文件中的php gzip配置怎么还是没有实现php gzip压缩,就是因为没有让apache装载deflate_module,方法如下,将

?#LoadModule deflate_module modules/mod_deflate.so

去除开头的#号,并重启apache即可。

  OK,下面看下经过php gizp压缩输出的页面大小


经过php gzip压缩输出配置的页面大小效果图

?

  通过上图我们可以看到phpinfo()函数的输出页面原来大小为71.7k,通过配置php gzip,大小被压缩为23.9k,php gzip压缩的效果还是很可观的。

  至此,通过修改php.ini配置文件实现php zlib(gzip)压缩输出的配置教程就介绍完了。

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