<?php// 列出一个文件下的所有文件名。function listDirFile($Dirpath){    if($dir = opendir($Dirpath)){        while(($file = readdir($dir)) !== false){            if( !is_dir($Dirpath.$file)){                echo "filename: $file<br>";            }        }    }}listDirFile(‘home/some_fff/‘);

<?php//  获取文件的后缀名function getExtension($filename){ $myext = substr($filename, strrpos($filename, ‘.‘));   return str_replace(‘.‘,‘‘,$myext); }$filename=‘sf.doc‘;echo getExtension($filename);?>