The RecursiveFilterIterator class
(PHP 5 >= 5.1.0)
简介
This abstract iterator filters out unwanted values for a RecursiveIterator. This class should be extended to implement custom filters. The RecursiveFilterIterator::accept() must be implemented in the subclass.
类摘要
$iterator
)$iterator
)Table of Contents
- RecursiveFilterIterator::__construct — Create a RecursiveFilterIterator from a RecursiveIterator
- RecursiveFilterIterator::getChildren — Return the inner iterator's children contained in a RecursiveFilterIterator
- RecursiveFilterIterator::hasChildren — Check whether the inner iterator's current element has children
用户评论:
[#1] lemats [2011-05-05 10:14:46]
Recursive directory/file listing, filteres ".svn":
<?php
class MyRecursiveFilterIterator extends RecursiveFilterIterator {
public static $FILTERS = array(
'.svn',
);
public function accept() {
return !in_array(
$this->current()->getFilename(),
self::$FILTERS,
true
);
}
}
$dirItr = new RecursiveDirectoryIterator('/sample/path');
$filterItr = new MyRecursiveFilterIterator($dirItr);
$itr = new RecursiveIteratorIterator($filterItr, RecursiveIteratorIterator::SELF_FIRST);
foreach ($itr as $filePath => $fileInfo) {
echo $fileInfo->getFilename() . PHP_EOL;
}
?>
[#2] Russell Dias [2010-09-28 06:38:32]
I had to create a filter to get values greater than a certain number in a multidimensional array.
Hope someone else finds it helpful:
<?php
class GreaterThanFilter extends RecursiveFilterIterator {
protected $limit;
public function __construct(RecursiveIterator $recursiveIter, $limit) {
$this->limit = $limit;
parent::__construct($recursiveIter);
}
public function accept() {
return $this->hasChildren() || strlen($this->current()) >= $this->limit;
}
public function getChildren() {
return new self($this->getInnerIterator()->getChildren(), $this->limit);
}
}
$iter = new RecursiveArrayIterator($array);
$filter = new GreaterThanFilter($iter, 5);
foreach(new RecursiveIteratorIterator($filter) as $key => $value)
{
echo $value . "\n";
}
?>