(PHP 5 >= 5.1.0)
SplFileObject::fflush — Flushes the output to the file
Forces a write of all buffered output to the file.
This function has no parameters.
Returns TRUE
on success or FALSE
on failure.
Example #1 SplFileObject::fflush() example
<?php
$file = new SplFileObject('misc.txt', 'r+');
$file->rewind();
$file->fwrite("Foo");
$file->fflush();
$file->ftruncate($file->ftell());
?>