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