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php 判断文件是否存在的函数有 is_dir() is_flie() flie_exist()
呵呵哒
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有以下三个

is_dir()判断目录  如果在里面传入变量   变量需要获取

   is_flie()  文件  同理

 flie_exist() 文件和目录  同上         关联函数 获取到可能是个字符串    所以要学会使用字符串相关的函数哟

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    2018-03-17 17:09:25