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AppendIterator::getIteratorIndex

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

AppendIterator::getIteratorIndexGets an index of iterators

说明

public AppendIterator::getIteratorIndex(): ?int

Gets the index of the current inner iterator.

参数

此函数没有参数。

返回值

Returns the zero-based, integer index of the current inner iterator if it exists, or null otherwise.

示例

示例 #1 AppendIterator.getIteratorIndex() basic example

<?php
$array_a
= new ArrayIterator(array('a' => 'aardwolf', 'b' => 'bear', 'c' => 'capybara'));
$array_b = new ArrayIterator(array('apple', 'orange', 'lemon'));

$iterator = new AppendIterator;
$iterator->append($array_a);
$iterator->append($array_b);

foreach (
$iterator as $key => $current) {
echo
$iterator->getIteratorIndex() . ' ' . $key . ' ' . $current . PHP_EOL;
}
?>

以上示例会输出:

0  a aardwolf
0  b bear
0  c capybara
1  0 apple
1  1 orange
1  2 lemon

参见

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