(PHP 5 >= 5.1.0, PHP 7)
SplFileObject::fseek — Seek to a position
public SplFileObject::fseek ( int $offset [, int $whence = SEEK_SET ] ) : int
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
.
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
.
Returns 0 if the seek was successful, -1 otherwise. Note that seeking past EOF is not considered an error.
Example #1 SplFileObject::fseek() example
<?php $file = new SplFileObject("somefile.txt"); // Read first line $data = $file->fgets(); // Move back to the beginning of the file // Same as $file->rewind(); $file->fseek(0); ?>
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https://www.php.net/manual/en/splfileobject.fseek.php