iterator_count
(PHP 5 >= 5.1.0, PHP 7)
iterator_count — Count the elements in an iterator
Description
int iterator_count ( Traversable $iterator ) Count the elements in an iterator. iterator_count() is not guaranteed to retain the current position of the iterator.
Parameters
iterator
The iterator being counted.
Return Values
The number of elements in iterator.
Examples
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)
NULLExample #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)← iterator_apply
iterator_to_array →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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