#27575 [Opn->Bgs]: ftell reports the size of appended bytes instead of the file pointer position

ID: 27575 Updated by: wez@php.net Reported By: fbernardi at bbros dot it -Status: Open +Status: Bogus -Bug Type: Filesystem function related +Bug Type: Documentation problem Operating System: Red Hat Linux PHP Version: 4.3.4 New Comment: Duplicate of Bug #24071. You cannot rely on ftell() or fseek() when working with an append-only stream. Previous Comments: ------------------------------------------------------------------------ [2004-03-11 14:33:10] fbernardi at bbros dot it Description: ------------ ftell() reports the size of bytes added to a file instead of the position of the file pointer in the file. I guess this behavior is reproduceable only on appending data to a file, since on new files the file pointer position is at the same place of the number of bytes added. Reproduce code: --------------- <?php # Adding something to the test-file to see the behavior $fp = fopen("test", w); fwrite($fp, "Ciao"); fflush($fp); fclose($fp); # test-file saved and closed # Opening a file with non-zero size (just added some bytes) $fp = fopen("test", a); fwrite($fp, "Ciao"); fflush($fp); $s = filesize("test"); $t = ftell($fp); print("The pointer should be at the position $s, but ftell reports $t"); fclose($fp); ?> Expected result: ---------------- The pointer should be at the position 8, but ftell reports 8 Actual result: -------------- The pointer should be at the position 8, but ftell reports 4 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27575&edit=1