(PHP 4, PHP 5 <= 5.0.5)
cpdf_output_buffer — Outputs the pdf document in memory buffer
Outputs the pdf document to stdout.
The document has to be created in memory which is the case if cpdf_open() has been called without the file name parameter.
The document handle, returned by cpdf_open().
如果成功则返回 TRUE，失败则返回 FALSE。