NoRewindIterator::__construct

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

NoRewindIterator::__construct — Construct a NoRewindIterator

说明

public NoRewindIterator::__construct ( Iterator $iterator )

Constructs a NoRewindIterator.

参数

iterator

The iterator being used.

返回值

A NoRewindIterator() based on the passed in iterator.

范例

示例 #1 NoRewindIterator::__construct() example

The second loop does not output because the iterator is only used once, as it does not rewind.

<?php
$fruit = array('apple', 'banana', 'cranberry');

$arr = new ArrayObject($fruit);
$it  = new NoRewindIterator($arr->getIterator());

echo "Fruit A:\n";
foreach( $it as $item ) {
    echo $item . "\n";
}

echo "Fruit B:\n";
foreach( $it as $item ) {
    echo $item . "\n";
}
?>

以上例程的输出类似于：

Fruit A:
apple
banana
cranberry
Fruit B:

参见