NoRewindIterator::__construct

(PHP 5 >= 5.1.0)

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

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：

Fruit A:
apple
banana
cranberry
Fruit B:

参见

NoRewindIterator::valid() - Validates the iterator