array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'en', ), 'this' => array ( 0 => 'function.fflush.php', 1 => 'fflush', ), 'up' => array ( 0 => 'ref.filesystem.php', 1 => 'Filesystem Functions', ), 'prev' => array ( 0 => 'function.feof.php', 1 => 'feof', ), 'next' => array ( 0 => 'function.fgetc.php', 1 => 'fgetc', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/filesystem/functions/fflush.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)
fflush — Flushes the output to a file
This function forces a write of all buffered output to the resource
pointed to by the file stream
.
stream
The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).
Example #1 File write example using fflush()
<?php
$filename = 'bar.txt';
$file = fopen($filename, 'r+');
rewind($file);
fwrite($file, 'Foo');
fflush($file);
ftruncate($file, ftell($file));
fclose($file);
?>