RecursiveDirectoryIterator::__construct

(PHP 5 >= 5.1.2, PHP 7, PHP 8)

RecursiveDirectoryIterator::__construct — Constructs a RecursiveDirectoryIterator

说明

public RecursiveDirectoryIterator::__construct(string $directory, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO)

Constructs a RecursiveDirectoryIterator() for the provided directory.

参数

directory: The path of the directory to be iterated over.
flags: Flags may be provided which will affect the behavior of some methods. A list of the flags can found under FilesystemIterator predefined constants. They can also be set later with FilesystemIterator::setFlags().

错误／异常

Throws an UnexpectedValueException if the directory does not exist.

Throws a ValueError if the directory is an empty string.

更新日志

版本	说明
8.0.0	Now throws a ValueError if `directory` is an empty string; previously it threw a RuntimeException.

示例

示例 #1 RecursiveDirectoryIterator example

<?php

$directory = '/tmp';

$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory));

$it->rewind();
while($it->valid()) {

    if (!$it->isDot()) {
        echo 'SubPathName: ' . $it->getSubPathName() . "\n";
        echo 'SubPath:     ' . $it->getSubPath() . "\n";
        echo 'Key:         ' . $it->key() . "\n\n";
    }

    $it->next();
}

?>

以上示例的输出类似于：

 
SubPathName: fruit/apple.xml
SubPath:     fruit
Key:         /tmp/fruit/apple.xml

SubPathName: stuff.xml
SubPath:     
Key:         /tmp/stuff.xml

SubPathName: veggies/carrot.xml
SubPath:     veggies
Key:         /tmp/veggies/carrot.xml

参见

FilesystemIterator::__construct() - Constructs a new filesystem iterator
RecursiveIteratorIterator::__construct() - Construct a RecursiveIteratorIterator
FilesystemIterator predefined constants

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User Contributed Notes 2 notes

down

pedro dot matamouros at gmail dot com ¶

13 years ago

You can use RecursiveDirectoryIterator::FOLLOW_SYMLINKS as a flag to the constructor to have RecursiveDirectoryIterator follow symlinks, which it does not do by default.



[EDIT BY danbrown AT php DOT net on 16-JUL-2012: Contains a typofix provided by (lightrekky AT gmail DOT com) in note #109280 on 02-JUL-2012.]

down

hanskrentel at yahoo dot de ¶

11 years ago

The two default flags are zero (virtual) as with my PHP versions (5.3 and 5.4). Which means you can not check if those are set or not with the & bitwise operator:

<?php
// CURRENT_AS_FILEINFO (0)
// KEY_AS_PATHNAME (0)

### always FALSE ###
$directoryIterator->getFlags() & RecursiveDirectoryIterator::CURRENT_AS_FILEINFO;

?>

But this also allows that you can use other flags right ahead without repeating the default ones:

<?php
new RecursiveDirectoryIterator(
    '.', 
    FilesystemIterator::UNIX_PATHS
);
?>

There is no need to repeat the default flags. Please note that this is different to FilesystemIterator which has as well the SKIP_DOTS flag as default which is non-zero:

<?php
new RecursiveDirectoryIterator(
    '.', 
    FilesystemIterator::SKIP_DOTS
        | FilesystemIterator::UNIX_PATHS
);
?>

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