# SplFileObject::seek

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplFileObject::seek — Seek to specified line

### 说明

public SplFileObject::seek(int `$line`): void

Seek to specified line in the file.

### 参数

`line`

  The zero-based line number to seek to.

### 返回值

没有返回值。

### 错误／异常

Throws a LogicException if the `line` is negative.

### 示例

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);

### 参见

- SplFileObject::current() - Retrieve current line of file
- SplFileObject::key() - Get line number
- SplFileObject::next() - Read next line
- SplFileObject::rewind() - Rewind the file to the first line
- SplFileObject::valid() - Not at EOF

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