IteratorIterator::valid
LimitIterator::__construct
Iteratoren
PHP Manual

# The LimitIterator class

## Einführung

The LimitIterator class allows iteration over a limited subset of items in an Iterator.

## Klassenbeschreibung

LimitIterator
LimitIterator extends IteratorIterator implements OuterIterator , Traversable , Iterator {
/* Methoden */
__construct ( Iterator `$iterator` [, int `$offset` = 0 [, int `$count` = -1 ]] )
public mixed current ( void )
public Iterator getInnerIterator ( void )
public int getPosition ( void )
public mixed key ( void )
public void next ( void )
public void rewind ( void )
public int seek ( int `$position` )
public bool valid ( void )
}

## Beispiele

Beispiel #1 LimitIterator usage example

`<?php
// Create an iterator to be limited
$fruits = new ArrayIterator(array(
'apple',
'banana',
'cherry',
'damson',
'elderberry'
));
// Loop over first three fruits only
foreach (new LimitIterator($fruits, 0, 3) as $fruit) {
var_dump($fruit);
}
echo "\n";
// Loop from third fruit until the end
// Note: offset starts from zero for apple
foreach (new LimitIterator($fruits, 2) as $fruit) {
var_dump($fruit);
}
?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    string(5) "apple"
    string(6) "banana"
    string(6) "cherry"

    string(6) "cherry"
    string(6) "damson"
    string(10) "elderberry"

## Inhaltsverzeichnis

- LimitIterator::__construct — Construct a LimitIterator
- LimitIterator::current — Get current element
- LimitIterator::getInnerIterator — Get inner iterator
- LimitIterator::getPosition — Return the current position
- LimitIterator::key — Get current key
- LimitIterator::next — Move the iterator forward
- LimitIterator::rewind — Rewind the iterator to the specified starting offset
- LimitIterator::seek — Seek to the given position
- LimitIterator::valid — Check whether the current element is valid

IteratorIterator::valid
LimitIterator::__construct
Iteratoren
PHP Manual