#38621 [Opn]: failed to truncate file using fopen in "w" mode

ID: 38621 Updated by: tony2001@php.net Reported By: rrlin923 at hotmail dot com Status: Open -Bug Type: *General Issues +Bug Type: Documentation problem Operating System: Linux PHP Version: 5.1.5 New Comment: The documentation is apparently wrong. Previous Comments: ------------------------------------------------------------------------ [2006-08-28 03:16:30] rrlin923 at hotmail dot com Description: ------------ The manual said that "w" mode for fopen() will place the file pointer at the beginning of the file and truncate the file to zero length. But the file cannot be truncated using that "w" mode by fopen(). Reproduce code: --------------- <? $file = "t.log"; $add_content = "add this"; /* prepare the file to be truncated */ $fh = fopen($file, 'w'); $res = fwrite($fh, $add_content) or die("write file error"); fclose($fh); echo $file . " size : " . filesize($file) . "bytes. \n"; $sh = fopen($file, 'w'); fclose($sh); echo $file . " size : " . filesize($file) . "bytes. \n"; ?> Expected result: ---------------- t.log size : 8bytes. t.log size : 0bytes. Actual result: -------------- t.log size : 8bytes. t.log size : 8bytes. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=38621&edit=1