fdatasync
(PHP 8 >= 8.1.0)
fdatasync — Synchronizes data (but not meta-data) to the file
說明
fdatasync(resource
$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().
參數
-
stream 檔案指針必須是有效的，必須指向由 fopen() 或 fsockopen() 成功打開的檔案(並還未由 fclose() 關閉)。
返回值
成功時返回 true， 或者在失敗時返回 false。
範例
示例 #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);
?>