SplObjectStorage::seek

(PHP 8 >= 8.4.0)

SplObjectStorage::seek — Seeks iterator to a position

说明

public SplObjectStorage::seek(int $offset): void

Seeks to a given position in the iterator.

参数

offset
The position to seek to.

返回值

没有返回值。

错误／异常

Throws an OutOfBoundsException if the offset is not seekable.

示例

示例 #1 SplObjectStorage::seek() example

Seeks to item position 2 in the iterator.

<?php
class Test {
public function __construct(public string $marker) {}
}

$a = new Test("a");
$b = new Test("b");
$c = new Test("c");

$storage = new SplObjectStorage();
$storage[$a] = "first";
$storage[$b] = "second";
$storage[$c] = "third";

$storage->seek(2);
var_dump($storage->key());
var_dump($storage->current());
?>

以上示例会输出：

int(2)
object(Test)#3 (1) {
  ["marker"]=>
  string(1) "c"
}