/** * @author Funsion Wu * @abstract SPL使用案例，全国首发，技术分享，欢迎转帖 */class Dir extends RecursiveDirectoryIterator {    const CHILD_FIRST = RecursiveIteratorIterator::CHILD_FIRST ;    const LEAVES_ONLY = RecursiveIteratorIterator::LEAVES_ONLY ;    const SELF_FIRST  = RecursiveIteratorIterator::SELF_FIRST ;    /* ideas：将Dir类设置为不变类，无状态类 */    private static function getDirIterator( $dir, $mode=self::LEAVES_ONLY ) {        if( !file_exists($dir) ){ exit ; }        $dirIterator = new RecursiveDirectoryIterator($dir);        $objIterator = new RecursiveIteratorIterator( $dirIterator, $mode );        return $objIterator;    }    /**     * 递归的删除目录                           + ----------------------------------------------------- +     * @param   $dir 要删除的目录     * @param   $delSelf 决定删除目录or清空目录，默认删除目录     */    public static function delDir( $dir, $delSelf=true ) {        $dirIterator = self::getDirIterator($dir, self::CHILD_FIRST);        foreach ( $dirIterator as $file ) {            if ( $file->isDir() ) {                 @ rmdir( $file->getRealPath() );            }else{                 @ unlink( $file->getRealPath() );            }        }        if( $delSelf ) { @ rmdir($dir); }    }    /**     * 递归的列出目录，遍历目录     + -------------------------- +     * @param   $dir 要操作的目录     */    public static function listDir ( $dir ) {        $dirIterator = self::getDirIterator( $dir, self::SELF_FIRST );        foreach ( $dirIterator as $file ) {            $filepath = str_replace(‘\\‘ , ‘/‘ , $file->getPath() );            $deep = substr_count( $filepath , ‘/‘ );            if( $file->isDir() ) {                $str .= ‘<div style="color:blue;margin-left:‘. 35*$deep .‘px"> + ‘ ;                $str .=  $file->getBasename() .‘</div>‘ ;            }elseif( $file->isFile() ){                $str .= ‘<div style="margin-left:‘. 35*$deep .‘px">‘ . $file->getBasename() .‘</div>‘;            }        }        return $str ;    }    /**     * 统计目录的信息（总字节数，文件数，目录数）     + -----------------------------=----------- +     * @param   $dir 要操作的目录     * @return  由目录信息组成的数组     */    public static function countDir( $dir ) {        $countDir = $countFiles = $size = 0 ;        $dirIterator = self::getDirIterator( $dir, self::SELF_FIRST );        foreach ( $dirIterator as $file ) {            if( $file->isDir() ) {                $countDir++ ;            }elseif( $file->isFile() ){                $countFiles++ ;                $size += $file->getSize() ;            }        }        return array( ‘countDir‘=>$countDir, ‘countFiles‘=>$countFiles, ‘size‘=>$size.‘ Byte‘ );    }    /**     * 递归的创建目录     + -------------------- +     * @param   $dir 要创建的目录     * @param   $mode 所创建目录的读写权限     */     public static function makeDir( $dir, $mode=0644 ) {        return mkdir( $dir, $mode, true );     }}/* ========================== 调用方法 =========================== */// Dir::delDir(‘./need_del_dir‘);// echo Dir::listDir(‘tools‘);// var_dump( Dir::countDir(‘tools‘) );// Dir::makeDir( ‘aaa/ccc/ddd/eee/fff‘ );