LimitIterator::__construct

(PHP 5 >= 5.1.0)

LimitIterator::__construct — Construct a LimitIterator

说明

public LimitIterator::__construct ( Iterator $iterator [, int $offset = 0 [, int $count = -1 ]] )

Constructs a new LimitIterator from an iterator with a given starting offset and maximum count.

参数

iterator: The Iterator to limit.
offset: Optional offset of the limit.
count: Optional count of the limit.

返回值

The new LimitIterator.

错误／异常

Throws an OutOfRangeException if the offset is less than 0 or the count is less than -1.

范例

Example #1 LimitIterator::__construct() example

  <?php
$ait  = new  ArrayIterator (array( 'a' ,  'b' ,  'c' ,  'd' ,  'e' ));
 $lit  = new  LimitIterator ( $ait ,  1 ,  3 );
foreach ( $lit  as  $value ) {
    echo  $value  .  "\n" ;
}
 ?>

以上例程会输出：

b
c
d

参见

LimitIterator examples