Why does openflashchart not display charts?

Why does openflashchart not display charts? I downloaded openflashchart online, and the version is: open-flash-chart-2-Lug-Wyrm-Charmer I run the built-in example why don't I show the chart? But what about the display? The original code is as follows: & lt ;? Php/** & nbsp; * PHPIntegrati help: Why is open flash chart not displayed?
Open flash chart I downloaded online, version: open-flash-chart-2-Lug-Wyrm-Charmer

Why don't I show charts when I run my own examples? But what about the display?

The original code is as follows:
/**
* PHP Integration of Open Flash Chart
* Copyright (C) 2008 John Glazebrook
*
* This library is free software; you can redistribute it and/or
* Modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* Version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* But without any warranty; without even the implied warranty
* MERCHANTABILITY or fitness for a special PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You shoshould have written ed a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

Require_once ('../lib/OFC/ofc_chart.php ');

$ Title = new OFC_Elements_Title (date ("d m d Y "));

$ Bar = new OFC_Charts_Bar_Glass ();
$ Bar-> set_values (array (9, 8, 7, 6, 5, 4, 3, 2, 1 ));

$ Chart = new OFC_Chart ();
$ Chart-> set_title ($ title );
$ Chart-> add_element ($ bar );

Echo $ chart-> toString ();
?>

Display result:

{"Title": {"text": "Tue Apr 17 2012"}, "elements": [{"type": "bar_glass", "values, 7, 6, 5, 4, 3, 2, 1]}


Do you know about prawns? Urgent, online, etc. Thank you!



------ Solution --------------------
Echo gmdate ('H: I: S', abs (strtotime ('2017-04-17 17:43:09 ')-strtotime ('2017-04-17 18:01:02 ')));

00:17:53

Calm down and think carefully