php基础练习--目录操作_PHP教程

php基础练习--目录遍历：

("content-type:text/html;charset=utf-8" = "./final/factapplication" listdir( = ( ( !== ( = ( = .'/'. ( != '.' && != '..' (( ."
"(); listdir

核心：递归的经典应用，以及文件和目录的基本操作。

= "../fileupload" = "b" copydir(, ( = ( ( !== ( = ( = ."/". = ."/". ( != "." && != ".." ((, (, (, ); copydir

核心：copy函数。

= 'a' deldir( = ( ( !== ( = ( = .'/'.( != '.' && != '..' (((( (); deldir

核心：注意unlink删除的是带path的file。

= "a" dirsize( = ( ( !== ( = ( = .'/'. ( != '.' && != '..'(( = + ( ( dirsize(); dirsize

核心：通过判断$tot在哪里返回，理解递归函数。

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