Re: file management
| From: | Sterling Hughes | Date: | Fri, 07 Sep 2001 21:35:09 +0000 |
| Subject: | Re: file management | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-66484@lists.php.net to get a copy of this message | ||
On Fri, 7 Sep 2001, Gerard Samuel wrote:
> Can a file be truncated from the beginning, and by x amount of lines??
> Thanks
>
Truncated from the beginning? Do you mean truncate the file by X
lines, starting from the first position in the file, well, yeah:
<?php
$fp = fopen("filename", "r+");
// Start counting from 0, set to one, if you want to start counting
// from 1
$count = 0;
while (!@feof($fp)) {
// Not used, but unless your line lengths are longer than
// 4K, this will effectively skip over a line
$line = fgets($fp, 4096);
if (++$count == $line_number_you_want) {
ftruncate($fp, ftell($fp));
}
}
fclose($fp);
?>
Please note the above is devoid of error checking :)
-Sterling