谁帮我看看这个函数是什么意思
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->function delFileUnderDir( $dirName ) { if ( $handle = opendir( "$dirName" ) ) { while ( false !==( $item = readdir( $handle ) ) ) { // if ( $item != "." && $item != ".." ) { if ( is_dir( "$dirName/$item" ) ) { delFileUnderDir( "$dirName/$item" ); } else { if( unlink( "$dirName/$item" ) )echo "成功删除文件: $dirName/$item<br>\n"; } } } closedir( $handle ); } }
false !==( $item = readdir( $handle ) )是什么意思 和调用递归函数,看得不是很懂,求解!!
------解决方案--------------------
意思如其名 删除某个文件夹下的文件
readdir() 成功则返回文件名 或者在失败时返回 FALSE
失败意味着opendir()出错了,该目录不存在或不可读
false !==( $item = readdir( $handle ) )
就是说如果成功的读取到了目录下文件的信息。
其实glob()函数实现这点功能更加好用
------解决方案--------------------
opendir ,readdir, 标准UNIX C接口。
这个函数就是递归删除一个目录以及子目录下的所有普通文件。

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