LimitIterator::__construct
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
LimitIterator::__construct — Construct a LimitIterator
说明
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.
错误／异常
Throws a ValueError
if the offset is less than 0
or the limit is less than -1.
更新日志
| 版本 | 说明 |
|---|---|
| 8.0.0 |
Now throws a ValueError if
offset is less than 0;
previously it threw a RuntimeException.
|
| 8.0.0 |
Now throws a ValueError if
limit is less than -1;
previously it threw a RuntimeException.
|
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
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