fsync
(PHP 8 >= 8.1.0)
fsync — Synchronizes changes to the file (including meta-data)
說明
fsync(resource
$stream): boolThis function synchronizes changes to the file, including its meta-data. This is similar to fflush(), but it also instructs the operating system to write to the storage media.
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 fsync() example
<?php
$file = 'test.txt';
$stream = fopen($file, 'w');
fwrite($stream, 'test data');
fwrite($stream, "\r\n");
fwrite($stream, 'additional data');
fsync($stream);
fclose($stream);
?> 參見
- fdatasync() - Synchronizes data (but not meta-data) to the file
- fflush() - 將緩衝內容輸出到檔案