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NoRewindIterator::__construct

(PHP 5 >= 5.1.0)

NoRewindIterator::__constructConstruct 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

Example #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:

1

2

3

4

5

Fruit A:

apple

banana

cranberry

Fruit B:

参见

  • NoRewindIterator::valid() - Validates the iterator