LimitIterator::__construct

(PHP 5 >= 5.1.0, PHP 7)

LimitIterator::__construct — Construct a LimitIterator

说明

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

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

参数

iterator

The Iterator to limit.

offset

Optional offset of the limit.

limit

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 limit is less than -1.

范例

示例 #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