Count the elements in an iterator

Descrierea

iterator_count ( Traversable $iterator ) : int

Count the elements in an iterator. iterator_count() is not guaranteed to retain the current position of the iterator.

Parametri

iterator: The iterator being counted.

Valorile întoarse

The number of elements in iterator.

Exemple

Example #1 iterator_count() example


<?php
$iterator = new ArrayIterator(array('recipe'=>'pancakes', 'egg', 'milk', 'flour'));
var_dump(iterator_count($iterator));
?>

Exemplul de mai sus va afișa:

int(4)

Example #2 iterator_count() modifies position


<?php
$iterator = new ArrayIterator(['one', 'two', 'three']);
var_dump($iterator->current());
var_dump(iterator_count($iterator));
var_dump($iterator->current());
?>

Exemplul de mai sus va afișa:

string(3) "one"
int(3)
NULL

Example #3 iterator_count() in foreach loops


<?php
$iterator = new ArrayIterator(['one', 'two', 'three']);
foreach ($iterator as $key => $value) {
    echo "$key: $value (", iterator_count($iterator), ")\n";
}?>

Exemplul de mai sus va afișa:

0: one (3)