Javascript debugger
Website design
↑
fseek
Seeks on a file pointer
(PHP 4, PHP 5)
int fseek ( resource handle, int offset [, int whence] )
Sets the file position indicator for the file referenced by handle. The new position, measured in bytes from the beginning of the file, is obtained by adding offset to the position specified by whence.
Parameters
- handle
A file system pointer resource that is typically created using fopen().
- offset
The offset.
To move to a position before the end-of-file, you need to pass a negative value in offset.
- 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.
Return Values
Upon success, returns 0; otherwise, returns -1. Note that seeking past EOF is not considered an error.
Examples
Example 648. fseek() example
<?php
$fp = fopen('somefile.txt', 'r');
// read some data
$data = fgets($fp, 4096);
// move back to the beginning of the file
// same as rewind($fp);
fseek($fp, 0);
?>