PHP - Manual: LimitIterator::__construct
2024-11-12
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
LimitIterator::__construct — Construct a LimitIterator
Constructs a new LimitIterator from an
iterator
with a given starting
offset
and maximum limit
.
iterator
The Iterator to limit.
offset
Optional offset of the limit.
limit
Optional count of the limit.
Throws a ValueError
if the offset
is less than 0
or the limit
is less than -1
.
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.
|
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
官方地址:https://www.php.net/manual/en/limititerator.construct.php