PHP 8 >= 8.1.0
fdatasync - Synchronizes data (but not meta-data) to the file
Code Examples

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.



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.

Related Functions

Example of fdatasync

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