Bug #78850 [Opn->Nab]: PHP Version 7.2.3 - fseek

Edit report at https://bugs.php.net/bug.php?id=78850&edit=1 ID: 78850 Updated by: requinix@php.net Reported by: david dot wildermoth at yandex dot com Summary: PHP Version 7.2.3 - fseek -Status: Open +Status: Not a bug Type: Bug -Package: Program Execution +Package: Filesystem function related Operating System: Widows 10 PHP Version: 7.2.24 Block user comment: N Private report: N New Comment: If you are not appending to the end of the file then you are overwriting. That's how files work. There is no way to insert at the beginning or in the middle of a file. If you want to prepend your records then a) load the entire file into memory, prepend, and write it all back out, or b) write the new record to a temporary file, append the old file into it, and rename the new file onto the old one Previous Comments: ------------------------------------------------------------------------ [2019-11-21 09:51:10] david dot wildermoth at yandex dot com Description: ------------ --- https://www.php.net/manual/en/function.fseek.php --- This "fseek" coding has a malfunction:- $record = fopen("C:xampp/htdocs/application/views/record.php", "r+"); fseek($record, 200); //fseek malfunctions $gm = gmdate("\nd M Y H:i T"); fwrite($record, $gm); $ad = (" - $advertiser") . "<br>"; fwrite($record, $ad); That producers a result similar to the following:- 21 Nov 2019 - 14:38 GMT - chris<br> Which is 35 bytes or thereabouts. That is OK for the first record, but if there exists a previous record, then that previous record will be overwritten which is what I don't want. If I advance (by white space) a previous record by about 35-40 bytes the new record will print plus consume an additional 35 odd bytes, and that previous record moves 35 bytes closer to the new record. I want to avoid that extra consumption. I want the output to consume only the bytes of its length, no more. If I insert "a" which takes the pointer to the end, everything works but the output is "recent at the bottom" whereas I want "recent at the top" hence using "r+" and "fseek". I have read the PHP manual on fseek() and fwrite() and others but there is nothing suggesting a consumption limitation, or similar. I've also tried various addins but nothing has worked. Expected result: ---------------- I want the output to consume only the bytes of its length, no more. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78850&edit=1