PHP常用缓存方式:
PHP常用缓存方式:
第一种,把需要缓存的数据进行处理,形成PHP可以直接执行的文件。在需要缓存数据的时候,通过include方式引入,并使用。
第二种,把需要的数据通过serialize函数序列化后直接保存到文件。在需要使用缓存数据的时候,通过反序列化读入文件内容并复制给需要的变量,然后使用。
测试结果:
通过测试我们发现,第二种也就是serialize缓存数据的方式更加高效。(数据略去,最后提供了文章地址下载,大家可以自行测试)
原因分析:
include方式读取缓存的时候,PHP需要执行几个过程
1.读取文件
2.解析所Include的文件
3.执行,给变量赋值
而serialize序列化方式读取缓存的时候:
1.读取数据
2.反序列化数据内容
3.给变量赋值
从以上内容对比的话,可能是由于解析PHP文件内的数组需要的时间超过unserialize反序列化数组的时间。如果你有兴趣可以查看《PHP filesystem相关函数和include require的性能效率研究》:http://www.ccvita.com/163.html
测试文件代码:
下载地址:MooPHP-CacheTest.zip
原创地址:http://www.ccvita.com/311.html 有新的研究心得会在这里更新。
CacheTest_IncludeFile.php
CacheTest_SerializeFile.php
总结分析:
第一种,include缓存的方式
优点:增加数据的保密性,和安全性,缓存内容不会被外界发现。
缺点:速度相对较慢。
用途:保存禁止系统外部得知的数据,比如web系统的设置,甚至MySQL信息等的保存
第二种,serialize序列化缓存的方式
优点:速度较快。
缺点:缓存系统文件路径一点曝光,缓存内容会泄露。
用途:缓存最新文章,相关文章等不担心外部得知的数据的时候,可以使用这种方式。

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