预定义常量:
DIRECTORY_SEPARATOR (string) :目录分隔符
PATH_SEPARATOR (string) :路径分隔符
bool chdir ( string $directory )— 改变目录
echo getcwd() . "\n"; chdir('public_html'); echo getcwd() . "\n";
bool chroot ( string $directory )— 改变根目录,仅在系统支持且运行于 CLI,CGI 或嵌入 SAPI 版本时才行。
dir::dir ( string $directory )— directory 类,有三个方法可用:read,rewind(将文件内部的位置指针重新指向一个数据流开头) 和 close
$d = dir("E:/work/html"); $methods = get_class_methods('dir'); print_r($methods); while(false !== ($entry = $d->read())){ echo $entry."<br/>"; } $d->close();
void closedir ( resource $dir_handle )— 关闭目录句柄
$dir = "/etc/php5/"; if (is_dir($dir)){ if ($dh = opendir($dir)){ $directory = readdir($dh); closedir($dh); } }
string getcwd ( void )— 取得当前工作目录
resource opendir ( string $path [, resource $context ] )— 打开目录句柄
string readdir ( resource $dir_handle )— 从目录句柄中读取条目
if ($handle = opendir('/path/to/files')) { echo "Directory handle: $handle\n"; echo "Files:\n"; while (false !== ($file = readdir($handle))) { echo "$file\n"; } closedir($handle); }
void rewinddir ( resource $dir_handle ) —将 dir_handle 指定的目录流重置到目录的开头
array scandir ( string $directory [, int $sorting_order [, resource $context ]] )— 列出指定路径中的文件和目录
$dir = '/tmp'; $files1 = scandir($dir); $files2 = scandir($dir, 1); print_r($files1); print_r($files2);