Two points worth noting:
1. fsync() is not suitable for high throughput, use it only when the durability of a file write really matters to you.
2. fsync() includes an implicit call to fflush() so you don't need to manually flush before you sync.
fsync
(PHP 8 >= 8.1.0)
fsync — 同步文件变更（包括元数据）
返回值
成功时返回 true， 或者在失败时返回 false。
示例
示例 #1 fsync() 示例
<?php
$file = 'test.txt';
$stream = fopen($file, 'w');
fwrite($stream, 'test data');
fwrite($stream, "\r\n");
fwrite($stream, 'additional data');
fsync($stream);
fclose($stream);
?>
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User Contributed Notes 1 note
Dave Gebler ¶
3 years ago
