(PHP 5 >= 5.1.0, PHP 7)
iterator_count — Count the elements in an iterator
Count the elements in an iterator.
iterator_count() is not guaranteed to retain the current
position of the iterator.
iteratorThe iterator being counted.
The number of elements in iterator.
Example #1 iterator_count() example
<?php
$iterator = new ArrayIterator(array('recipe'=>'pancakes', 'egg', 'milk', 'flour'));
var_dump(iterator_count($iterator));
?>
The above example will output:
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());
?>
The above example will output:
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";
}?>
The above example will output:
0: one (3)