The RecursiveFilterIterator class

(PHP 5 >= 5.1.0)

Introduction

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.

Class synopsis

abstract RecursiveFilterIterator extends FilterIterator implements OuterIterator , RecursiveIterator {

/* Methods */

public __construct ( RecursiveIterator $iterator )

public RecursiveFilterIterator getChildren ( void )

public bool hasChildren ( void )

/* Inherited methods */

public abstract bool FilterIterator::accept ( void )

public FilterIterator::__construct ( Iterator $iterator )

public mixed FilterIterator::current ( void )

public Iterator FilterIterator::getInnerIterator ( void )

public mixed FilterIterator::key ( void )

public void FilterIterator::next ( void )

public void FilterIterator::rewind ( void )

public bool FilterIterator::valid ( void )

}

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

Коментарии

Sep 28

Автор: Russell Dias


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";

}

?>

2010-09-28 09:38:32

http://php5.kiev.ua/manual/ru/class.recursivefilteriterator.html

May 05

Автор: lemats


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;

}



?>