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Jun 23, 2016 pm 02:35 PM

一、字符串
二、数字
三、日期时间
四、数组
五、变量
六、函数
七、类和对象
八、web基础 cookie post
九、表单
十、访问数据库
十一、session和数据保持
十二、XML
十三、WEB自动化
十四、消费web服务
十五、建立web服务
十六、互联网服务
十七、图形
十八、安全和加密
十九、国际化和本地化
二十、错误处理，故障排除和测试
二十一、性能调谐和负载测试
二十二、正则表达式
二十三、文件
二十四、目录
二十五、命令行PHP
二十六、PEAR和PECL

a.类的属性和变量的区别；

成员方法类的属性和标准的变量很相似，除了必须在声明和赋值前加一个代表可见性的关键字之外。

（public protected private）

b.使用->字符连接对象变量和属性名来访问属性变量

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