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PHP: fdatasync - Manual

(PHP 8 >= 8.1.0)

fdatasync — Synchronizes data (but not meta-data) to the file

Description

Parameters

stream

The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).

Return Values

Returns true on success or false on failure.

Examples

Example #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);
?>

See Also

  • fflush() - Flushes the output to a file
  • fsync() - Synchronizes changes to the file (including meta-data)

Found A Problem?

greg at example dot com

2 years ago

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.