RecursiveFilterIterator クラス

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

はじめに

この抽象イテレータは、不要な値を RecursiveIterator から取り除きます。 このクラスを継承して、独自のフィルタを実装することができます。 RecursiveFilterIterator::accept() は、サブクラスで必ず実装しなければなりません。

クラス概要

abstract class RecursiveFilterIterator extends FilterIterator implements RecursiveIterator {
/* メソッド */
public __construct(RecursiveIterator $iterator)
public hasChildren(): bool
/* 継承したメソッド */
}

目次

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User Contributed Notes 2 notes

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8
lemats
13 years ago
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;
}

?>
up
3
Russell Dias
14 years ago
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";
}
?>
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