Flushes the output to the file

# SplFileObject::fflush

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplFileObject::fflush — Flushes the output to the file

### Description

public SplFileObject::fflush(): bool

Forces a write of all buffered output to the file.

### Parameters

This function has no parameters.

### Return Values

Returns `true` on success or `false` on failure.

### Examples

Example #1 SplFileObject::fflush() example

`<?php
$file = new SplFileObject('misc.txt', 'r+');
$file->rewind();
$file->fwrite("Foo");
$file->fflush();
$file->ftruncate($file->ftell());
?>`

### See Also

- SplFileObject::fwrite() - Write to file

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