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PHP之readdir()函数,phpreaddir函数

  最近在学习php文件操作的相关知识,记录一下readdir()函数其中的一个要注意的点

          1、 在$temp=readdir($handle)函数中 readdir获取的是文件名和$handle中的文件夹名,

    一般在程序中遍历文件通过while()循环:

         while($temp=readdir($handel)){}

      但是这种写法的判断语句存在一个问题就是:如果$handle下面有个文件夹的名字为'0',那么$temp=0,while循环就无法进行下去,那么就无法遍历其余的文件,导致程序结果不对,

        正确的写法:

    while(($temp=readdir($handel))!==false){}//用不全等于是区分如果文件夹名字为0的时候,那么0!==false,仍然可以遍历

      

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