让你的PHP程序快马加鞭 PHP程序优化探密_PHP
PHP作为一种脚本语言，以方便易于学习受到众多Web开发人员的喜爱，然而PHP也秉承了脚本语言的多种缺陷，如：代码数量庞大、执行效率低等；因此优化是PHP开发人员必须掌握的一种技巧。
本期专题从多个角度较为全面细致地阐述了PHP加速的相关技术，包括测试技术，加速技术(压缩，缓存等)，基本上都有附代码和范例。希望有助于读者全面了解PHP程序加速并在实际应用中选择合适的加速方案。
简介
今天，很少有人会怀疑时间是最宝贵的财富，尤其是商场上。程序速度越快，用户节约时间越多，这样你的程序就可以用更少的时间和服务器资源为用户服务，进而产生更多效益。 >>>[全文阅读]
服务器负载测试
服务器负载太大而影响程序效率也是很常见的，我们需要对此进行测试。这里我以目前最常用的Apache服务器为例。 >>>[全文阅读]
脚本执行速度测试
只有找到影响速度的代码，我们才有可能进行优化。PEAR的benchmark包中的Benchmark_Timer类和Benchmark_Iterate类，可以用来很方便地测试脚本执行的速度。 >>>[全文阅读]
代码优化
掌握了PEAR::BenchMark，现在你已经知道如何测试你的代码，知道如何判断你的代码是快是慢，是哪一部份比较慢。那么接下来我要说的就是如何消灭或优化那部份慢的代码。 >>>[全文阅读]
压缩输出gzip
利用Apache中的mod_gzip模块，我们可以利用gzip的压缩算法来对Apache服务器发布的网页内容进行压缩后再传输到客户端的浏览器。如果是纯文本的内容，效果非常明显，大约可以压缩到原来的30%-40%，使用户的浏览速度大大加快。 >>>[全文阅读]
缓存输出
接下来我们开始探索更常用的缓存技术，这也是本文的重点部份。首先我们使用PEAR中的cache包。PEAR可以将内容缓存于文件，数据库或者内存中，我们以文件为例。 >>>[全文阅读]
加速工具软件
最后我们要关注一下PHP加速的另一个领域—缓存工具软件。这类软件都是从优化PHP运行环境来提速的，不需要改变任何代码。我们可以大概地将它们称为“执行码优化/缓存工具”，你可以理解为它们用来实现比较底层的优化/缓存。 >>>[全文阅读]
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