Directory 函数
PHP 手册

dir

(PHP 4, PHP 5)

dirReturn an instance of the Directory class

说明

Directory dir ( string $directory [, resource $context ] )

A pseudo-object oriented mechanism for reading a directory. The given directory is opened.

参数

directory

Directory to open

context

Note: 在 PHP 5.0.0 中增加了对上下文(Context)的支持。有关上下文(Context)的说明参见 Streams

返回值

Returns an instance of Directory, or NULL with wrong parameters, or FALSE in case of another error.

范例

Example #1 dir() example

Please note the fashion in which Directory::read()'s return value is checked in the example below. We are explicitly testing whether the return value is identical to (equal to and of the same type as - see Comparison Operators for more information) FALSE since otherwise, any directory entry whose name evaluates to FALSE will stop the loop.

<?php
$d 
dir("/etc/php5");
echo 
"Handle: " $d->handle "\n";
echo 
"Path: " $d->path "\n";
while (
false !== ($entry $d->read())) {
   echo 
$entry."\n";
}
$d->close();
?>

以上例程的输出类似于:

Handle: Resource id #2
Path: /etc/php5
.
..
apache
cgi
cli

注释

Note:

The order in which directory entries are returned by the read method is system-dependent.


Directory 函数
PHP 手册