. PHP Manual . Prev . Next . (PHP 4 ) fflush -- Flushes the output to a file . int fflush ( int fp) . This function forces a write of all buffered output to the to the resource pointed to by the file handle fp . Returns TRUE if successful, FALSE otherwise. The file pointer must be valid, and must point to a file successfully opened by fopen() , popen() , or fsockopen() . Prev . Home . Next . feof . Up . fgetc