PHP fflush() Function

Write all buffered output to the open file:

<?php
$file = fopen("test.txt","r+");
rewind($file);
fwrite($file, 'Hello World');
fflush($file);

fclose($file);
?>

Definition and Usage

The fflush() function writes all buffered output to an open file.

fflush( file)

Parameter	Description
file	Required. Specifies the open file to write the buffered output to

Return Value:	TRUE on success, FALSE on failure
PHP Version:	4.0.1+