LimitIterator 类
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
简介
LimitIterator 类允许遍历一个 Iterator 的限定子集的元素。
类摘要
/* 方法 */
/* 继承的方法 */
}示例
示例 #1 LimitIterator usage example
<?php
// Create an iterator to be limited
$fruits = new ArrayIterator(array(
'apple',
'banana',
'cherry',
'damson',
'elderberry'
));
// Loop over first three fruits only
foreach (new LimitIterator($fruits, 0, 3) as $fruit) {
var_dump($fruit);
}
echo "\n";
// Loop from third fruit until the end
// Note: offset starts from zero for apple
foreach (new LimitIterator($fruits, 2) as $fruit) {
var_dump($fruit);
}
?>以上示例会输出：
string(5) "apple" string(6) "banana" string(6) "cherry" string(6) "cherry" string(6) "damson" string(10) "elderberry"
目录
- LimitIterator::__construct — Construct a LimitIterator
- LimitIterator::current — Get current element
- LimitIterator::getPosition — Return the current position
- LimitIterator::key — Get current key
- LimitIterator::next — Move the iterator forward
- LimitIterator::rewind — Rewind the iterator to the specified starting offset
- LimitIterator::seek — Seek to the given position
- LimitIterator::valid — Check whether the current element is valid
＋添加备注
用户贡献的备注 1 note
christophg at grenz-bonn dot de ¶
3 years ago
If the inner iterator implements SeekableIterator, LimitIterator uses seek() after rewind() to move to the offset.