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PHP编程第六课：php基础6-PHP培训九期线上班
渡劫小能手
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一、练习post传值(手写)

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二、 函数自行学习一些

函数                       描述

strtolower()         将字符串转化为小写    

strtoupper           将字符串转化为大写    

strlen()                 获取字符串长度    

trim()                   去除字符串首尾处的空白字符（或者其他字符）    

ltrim()                  去除字符串开头的空白字符    

rtrim()                 去除字符串结尾的空白字符    

str_replace()       字符串替换    

strpbrk()             字符串中查找一组字符是否存在    

explode()            将字符串分割为数组    

implode()           把数组元素组合为字符串    

md5()                 将字符串进行md5加密    

Correcting teacher：查无此人查无此人

Correction status：qualified

Teacher's comments：完成的不错，继续加油。
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