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DirectoryIterator クラス

(PHP 5, PHP 7, PHP 8)

はじめに

DirectoryIterator クラスは、 ファイルシステムのディレクトリを閲覧するためのシンプルなインターフェイスです。

クラス概要

class DirectoryIterator extends SplFileInfo implements SeekableIterator {
/* メソッド */
public __construct(string $directory)
public current(): mixed
public getBasename(string $suffix = ""): string
public isDot(): bool
public key(): mixed
public next(): void
public rewind(): void
public seek(int $offset): void
public __toString(): string
public valid(): bool
/* 継承したメソッド */
public SplFileInfo::getBasename(string $suffix = ""): string
public SplFileInfo::openFile(string $mode = "r", bool $useIncludePath = false, ?resource $context = null): SplFileObject
public SplFileInfo::setFileClass(string $class = SplFileObject::class): void
public SplFileInfo::setInfoClass(string $class = SplFileInfo::class): void
}

目次

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User Contributed Notes 4 notes

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58
krystianmularczyk at gmail dot com
15 years ago
Shows us all files and catalogues in directory except "." and "..".

<?php

foreach (new DirectoryIterator('../moodle') as $fileInfo) {
if(
$fileInfo->isDot()) continue;
echo
$fileInfo->getFilename() . "<br>\n";
}

?>
up
3
alvaro at demogracia dot com
7 years ago
DirectoryIterator is just an lightweight SplFileInfo iterator and its methods operate on whatever item the internal cursor points to. In other words:

<?php
$iterator
= new DirectoryIterator('C:\\');
echo
$iterator->getPathname();
?>

... will NOT print "C:\" but the path of the first file or subdirectory retrieved, e.g. "C:\$Recycle.Bin".
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5
David Lanstein
15 years ago
DirectoryIterator::getBasename() has been also been available since 5.2.2, according to the changelog (not documented yet). It takes a parameter $suffix, and is useful if, for instance, you use a naming convention for your files (e.g. ClassName.php).

The following code uses this to add recursively All*Tests.php in any subdirectory off of tests/, basically, suites of suites.

<?php
// PHPUnit boilerplate code goes here

class AllTests {
public static function
main() {
$parameters = array('verbose' => true);
PHPUnit_TextUI_TestRunner::run(self::suite(), $parameters);
}

public static function
suite() {
$suite = new PHPUnit_Framework_TestSuite('AllMyTests'); // this must be something different than the class name, per PHPUnit
$it = new AllTestsFilterIterator(
new
RecursiveIteratorIterator(
new
RecursiveDirectoryIterator(dirname(__FILE__) . '/tests')));

for (
$it->rewind(); $it->valid(); $it->next()) {
require_once(
$it->current());
$className = $it->current()->getBasename('.php');
$suite->addTest($className::suite());
}

return
$suite;
}
}
?>

Also, the AllTestsFilterIterator above extends FilterIterator, and contains one method, accept():

<?php
class AllTestsFilterIterator extends FilterIterator {
public function
accept() {
if (
preg_match('/All.*Tests\.php/', $this->current())) {
return
true;
} else {
return
false;
}
}
}
?>
up
8
rogier at dsone dot nl
12 years ago
Beware of the behavior when using FilesystemIterator::UNIX_PATHS, it's not applied as you might expect.

I guess this flag is added especially for use on windows.
However, the path you construct the RecursiveDirectoryIterator or FilesystemIterator with will not be available as a unix path.
I can't say this is a bug, since most methods are just purely inherited from DirectoryIterator.

In my test, I'd expected a complete unix path. Unfortunately... not quite as expected:

<?php
// say $folder = C:\projects\lang

$flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS | FilesystemIterator::UNIX_PATHS;
$d_iterator = new RecursiveDirectoryIterator($folder, $flags);

echo
$d_iterator->getPath();

?>

expected result: /projects/lang (or C:/projects/lang)
actual result: C:\projects\lang
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