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 $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