note 10242 added to fwrite

On Linux (RH6.1), if the hard drive is full, fwrite does not return an error. For example: $fd = fopen( "/tmp/tmp", "w+" ); $str = "hello world"; $len = strlen( $str ); $size = fwrite( $fd, $str, $len ); //here we have $size == $len fclose( $fd ); // the file is empty due to no space in the hard drive. To detect fwrite error, add set_file_buffer( $fd, 0 ) before fwrite, and fwrite will return an error. http://www.php.net/manual/function.fwrite.php