使用APC最优化PHP
PHP也许是在Linux开发者中最受欢迎的网站构建语言,同时也是在其它平台程序员中可利用的语言。PHP是全面支持的,快速而且相当灵活。 然而,PHP却有一个缺陷。因为PHP是一个脚本语言,因此他在执行任何特定的闲混的脚本之前就能编辑。但是如今大部分的现代系统能够快速地这样做,那么获取在网络中脱颖而出的具有最佳性能的一个,总是一件好事。 Alternative PHP Cache (APC)是一种对PHP有效的开放源高速缓冲储存器工具,它能够隐藏编辑的脚本。所以对于后来命令,如果它已经改变了,PHP只能重新编辑脚本。 但是这这样只能导致在某些脚本上获取最适度的性能,而且这对更复杂的脚本更有意义。不同于它的一些竞争者,APC是开放源,而且是广泛适用的。你可以从APC网站上下载源编码。 免费的商业版本也是可用的:Zend的Zend优化者。(Zend是编写引擎PHP的公司,编辑脚本.)但是,独立报告已经公布APC的收获比起Zend的优化者更有意义。 安装APC是非常便捷的;只要下载了APC的源编码,就无需配置其它,用来使其在盒子之外工作。最新版本是 2.0.4。执行以下操作,安装APC: # tar xvzf APC-2.0.3.tgz # cd APC-2.0.3 # /usr/bin/phpize # ./configure --enable-apc # make # make install 如果你的PHP的安装不是在/usr下,你必须从你的安装目录下的bin/目录调出phpize.比如,如果你已经在/usr/local/php下安装了PHP,你就需要执行/usr/local/php/bin/phpize。 下一步,使用一个文本编辑软件编辑php.ini文件(通常是/etc/php.ini),把如下的内容增加到尾部: extension="/usr/local/php/lib/php/extensions/no-debug-non-zts-20050922/apc.so" 保存文件,重启Apache。然后,在你的网树某个位置创建一个叫做info.php的文件,包括如下: 在你的浏览器上打开此页。你会在输出上看到APC的一部分。你现在就能利用APC加速你的PHP脚本。

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