(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplFileObject::seek — Seek to specified line
lineThe zero-based line number to seek to.
没有返回值。
Throws a LogicException if the
line is negative.
示例 #1 SplFileObject::seek() example
This example outputs the third line of the script which is found at position 2.
<?php
$file = new SplFileObject(__FILE__);
$file->seek(2);
echo $file->current();
?>以上示例的输出类似于：
$file->seek(2);