SplFileObject::fscanf
SplFileObject::fstat
SplFileObject
PHP Manual

# SplFileObject::fseek

(PHP 5 >= 5.1.0)

SplFileObject::fseek — Seek to a position

### 説明

public int SplFileObject::fseek ( int `$offset` [, int `$whence`= SEEK_SET ] )

Seek to a position in the file measured in bytes from the beginning of the file, obtained by adding `offset` to the position specified by `whence` .

### パラメータ

`offset`

  The offset. A negative value can be used to move backwards through the file which is useful when SEEK_END is used as the `whence` value.

`whence`

  `whence` values are:

  - `SEEK_SET` - Set position equal to `offset` bytes.
  - `SEEK_CUR` - Set position to current location plus `offset` .
  - `SEEK_END` - Set position to end-of-file plus `offset` .

  If `whence` is not specified, it is assumed to be `SEEK_SET`.

### 返り値

Returns 0 if the seek was successful, -1 otherwise. Note that seeking past EOF is not considered an error.

### 例

例1 SplFileObject::fseek example

`<?php
$file = new SplFileInfo("somefile.txt");
// Read first line
$data = $file->fgets();
// Move back to the beginning of the file
// Same as $file->rewind();
$file->fseek(0);
?>`

### 参考

- fseek() - ファイルポインタを移動する

SplFileObject::fscanf
SplFileObject::fstat
SplFileObject
PHP Manual