iterator_apply

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

iterator_apply — Call a function for every element in an iterator

Açıklama

iterator_apply(Traversable$iterator, callable$callback, ?array$args = null): int

Calls a function for every element in an iterator.

Bağımsız Değişkenler

iterator: The iterator object to iterate over.
callback: The callback function to call on every element. This function only receives the given args, so it is nullary by default. If count($args) === 3, for instance, the callback function is ternary.
Bilginize: The function must return true in order to continue iterating over the iterator.
args: An array of arguments; each element of args is passed to the callback callback as separate argument.

Dönen Değerler

Returns the iteration count.

Örnekler

Örnek 1 iterator_apply() example

<?php
function print_caps(Iterator $iterator) {
 echo strtoupper($iterator->current()) . "\n";
 return TRUE;
}

$it = new ArrayIterator(array("Apples", "Bananas", "Cherries"));
iterator_apply($it, "print_caps", array($it));
?>

Yukarıdaki örneğin çıktısı:

APPLES BANANAS CHERRIES

Ayrıca Bakınız

array_walk() - Bir dizinin her üyesine kullanıcı tanımlı bir işlevi uygular