Does not flush st_atime, st_mtime or st_size.
If you need to use filesize after a write you will need need fsync() or fflush() instead.
(PHP 8 >= 8.1.0)
fdatasync — Synchronizes data (but not meta-data) to the file
$stream): bool
This function synchronizes stream contents to storage media, just like fsync() does,
but it does not synchronize file meta-data.
Note that this function is only effectively different in POSIX systems.
In Windows, this function is aliased to fsync().
streamO ponteiro de arquivo deve ser válido e deve apontar para um arquivo aberto com sucesso por fopen() ou fsockopen() (e ainda não fechado por fclose()).
Retorna true em caso de sucesso ou false em caso de falha.
Exemplo #1 fdatasync() example
<?php
$file = 'test.txt';
$stream = fopen($file, 'w');
fwrite($stream, 'test data');
fwrite($stream, "\r\n");
fwrite($stream, 'additional data');
fdatasync($stream);
fclose($stream);
?>Does not flush st_atime, st_mtime or st_size.
If you need to use filesize after a write you will need need fsync() or fflush() instead.