LimitIterator::__construct()

(PHP 5>=5.1.0,PHP 7)

Construct a LimitIterator

说明

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

Constructs a newLimitIteratorfrom an$iteratorwith a given starting$offsetand maximum$count.

参数

$iterator: TheIteratorto limit.
$offset: Optional offset of the limit.
$count: Optional count of the limit.

返回值

The newLimitIterator.

错误／异常

Throws anOutOfRangeExceptionif the$offsetis less than0or the$countis less than-1.

范例

Example#1LimitIterator::__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