PHP 5.6.14 is available


(PHP 5 >= 5.1.0)

SplFileObject::fseekSeek to a position


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.



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 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.


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


Beispiel #1 SplFileObject::fseek() example

= new SplFileInfo("somefile.txt");

// Read first line
$data $file->fgets();

// Move back to the beginning of the file
// Same as $file->rewind();

Siehe auch

  • fseek() - Positioniert den Dateizeiger

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User Contributed Notes 1 note

wangbuying at gmail dot com
2 years ago
make sure you know this fseek in SplFileObject is different from \fseek.
Argument for fseek in SplFileObject is the line number, not the bytes.
= new SplFileObject('./fseek.txt', 'rb');
$fp->fseek(70); // now go to line 70, not byte 70
echo $fp->fgets();
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