什么是PEAR？什么是PECL？PHP中两个容易混淆的概念解释_php技巧
概述
关于PEAR，PECL这两个东西，初学PHP的时候就知道，但是貌似用的人很少再加上以前也是在Windows下做开发，所以了解的不多，现在转到Mac了，就把这两个东西彻底弄弄清楚。
什么是PEAR
PEAR的全称是PHP Extension and Application Repository，是PHP的扩展库，采用PHP语言编写。所以我们可以直接下载，并在我们的代码中包含(include)扩展库。
什么是PECL
PECL的全称是PHP Extension Community Library，它也是PHP的扩展库。PECL的扩展都是采用C语言编写的，可以被载入PHP中，给PHP增加额外的功能，比如PHP的Mongo扩展。
PEAR VS PECL
PEAR采用PHP编写，PECL采用C语言编写
PEAR也是一个PHP编码的标准
总结
以后安装PHP扩展库的时候，比如Mongo扩展，直接采用PECL安装，应该不会再出现版本不匹配的情况了~~
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