获取文件后缀,遍历目录层次
/** * 5种方式获取文件后缀名 * 这道题其实就是考函数substr() strrchr() array_pop() strrpos() strpos() strrev() explode() pathinfo() * @param string $filename 要处理的文件名 1.jpg/1.png/1.html/1.php * @return string .php/php */ function get_ext1($filename) { return strrchr($filename,'.'); } function get_ext2($filename){ return substr($filename,strrpos($filename,'.')); } function get_ext3($filename){ return array_pop(explode('.',$filename)); } function get_ext4($filename){ return pathinfo($filename,PATHINFO_EXTENSION); } function get_ext5($filename){ return strrev(substr(strrev($filename),0,strpos(strrev($filename),'.'))); } $filename = "1.php"; echo get_ext1($filename)."\n"; echo get_ext2($filename)."\n"; echo get_ext3($filename)."\n"; echo get_ext4($filename)."\n"; echo get_ext5($filename)."\n";/** * 遍历目录(递归) * @param string $dir 目录名且最后没有/ * @return array $files 整个目录结构 */ function myScandir($dir) { $files = array(); if($handle = opendir($dir)){ while (($file = readdir($handle)) != false){ if($file != "." && $file != ".."){ $newDir = $dir."/".$file; if(is_dir($newDir)){ $files[$file] = myScandir($newDir); }else{ $files[] = $file; } } } closedir($handle); return $files; } } $dir = "/dirname"; print_r(myScandir($dir));
转载于:https://www.cnblogs.com/CodeAnti/p/4878054.html
