For some inexplicable questions about the gd library and jpgraph, please take a look.

Regarding an inexplicable problem about the gd library and jpgraph, let's take a look at php.5.3.6. php-gd supports compiling in the DSO format. I have a php program named 2.0.34compatible in the gd library and used jpgraph, one debian, one ubuntu11, the gd libraries of the two machines, and the php and gd extensions are both manually compiled and installed. Others are an inexplicable problem about the gd library and jpgraph, let's take a look.
Php.5.3.6, php-gd can be compiled into the DSO format, and 2.0.34 compatible for the gd Library

I have a php program that uses jpgraph, debian, ubuntu11, the gd libraries of the two machines, php, and gd extensions, both of which are manually compiled and installed. Others, such as libpng, libjpeg and libfreetype are both installed in the same version.

However, this program runs on debian. when the stroke method is executed on Ubuntu 11 to generate a file, garbled characters are output to the browser. apache error_log does not contain any error information.

The gd part in phpinfo is exactly the same (Ubuntu 11 uses the new version downloaded from the source, and some packages have the same effect)

------ Solution --------------------
Output stroke to the file and save it as an image file. Try
Different browsers may cause browser problems. Php header.
------ Solution --------------------
You must install the font file by yourself.

I don't know if it can be used to copy the window. you can try it.