# The FilterIterator class

(PHP 5 >= 5.1.0, PHP 7)

## Introduction

This abstract iterator filters out unwanted values. This class should be extended to implement custom iterator filters. The FilterIterator::accept() must be implemented in the subclass.

## Class synopsis

abstract FilterIterator extends IteratorIterator implements OuterIterator {
/* Methods */
public abstract accept ( ) : bool
public __construct ( Iterator `$iterator` )
public current ( ) : mixed
public getInnerIterator ( ) : Iterator
public key ( ) : mixed
public next ( ) : void
public rewind ( ) : void
public valid ( ) : bool
}

## Table of Contents

- FilterIterator::accept — Check whether the current element of the iterator is acceptable
- FilterIterator::__construct — Construct a filterIterator
- FilterIterator::current — Get the current element value
- FilterIterator::getInnerIterator — Get the inner iterator
- FilterIterator::key — Get the current key
- FilterIterator::next — Move the iterator forward
- FilterIterator::rewind — Rewind the iterator
- FilterIterator::valid — Check whether the current element is valid