PHP 8.4.0 RC2 available for testing

AppendIterator::__construct

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

AppendIterator::__constructConstructs an AppendIterator

Beschreibung

public AppendIterator::__construct()

Constructs an AppendIterator.

Parameter-Liste

Diese Funktion besitzt keine Parameter.

Beispiele

Beispiel #1 Iterating AppendIterator with foreach

<?php
$pizzas
= new ArrayIterator(array('Margarita', 'Siciliana', 'Hawaii'));
$toppings = new ArrayIterator(array('Cheese', 'Anchovies', 'Olives', 'Pineapple', 'Ham'));

$appendIterator = new AppendIterator;
$appendIterator->append($pizzas);
$appendIterator->append($toppings);

foreach (
$appendIterator as $key => $item) {
echo
$key . ' => ' . $item . PHP_EOL;
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

0 => Margarita
1 => Siciliana
2 => Hawaii
0 => Cheese
1 => Anchovies
2 => Olives
3 => Pineapple
4 => Ham

Beispiel #2 Iterating AppendIterator with the AppendIterator API

<?php
$pizzas
= new ArrayIterator(array('Margarita', 'Siciliana', 'Hawaii'));
$toppings = new ArrayIterator(array('Cheese', 'Anchovies', 'Olives', 'Pineapple', 'Ham'));

$appendIterator = new AppendIterator;
$appendIterator->append($pizzas);
$appendIterator->append($toppings);

while (
$appendIterator->valid()) {
printf(
'%s => %s => %s%s',
$appendIterator->getIteratorIndex(),
$appendIterator->key(),
$appendIterator->current(),
PHP_EOL
);
$appendIterator->next();
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

0 => 0 => Margarita
0 => 1 => Siciliana
0 => 2 => Hawaii
1 => 0 => Cheese
1 => 1 => Anchovies
1 => 2 => Olives
1 => 3 => Pineapple
1 => 4 => Ham

Anmerkungen

Achtung

When using iterator_to_array() to copy the values of the AppendIterator into an array, you have to set the optional use_key argument to false. When use_key is not false any keys reoccurring in inner iterators will get overwritten in the returned array. There is no way to preserve the original keys.

Siehe auch

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top