CascadiaPHP 2024

La clase RecursiveFilterIterator

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

Introducción

Este iterador abstracto filtra valores no deseados de RecursiveIterator. Esta clase debería ampliarse para implementar filtros personalizados. El método RecursiveFilterIterator::accept() debe ser implementado en la subclase.

Sinopsis de la Clase

abstract class RecursiveFilterIterator extends FilterIterator implements OuterIterator, RecursiveIterator {
/* Métodos */
public __construct(RecursiveIterator $iterator)
public hasChildren(): bool
/* Métodos heredados */
}

Tabla de contenidos

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User Contributed Notes 2 notes

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9
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
4
Russell Dias
13 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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