Writes the pdf document into a file (PHP 3 >= 3.0.8, PHP 4, PHP 5 <= 5.0.4)
bool cpdf_save_to_file ( int pdf_document, string filename )

The cpdf_save_to_file() function outputs the pdf document into a file if it has been created in memory. 如果成功则返回 TRUE,失败则返回 FALSE

This function is not needed if the pdf document has been open by specifying a filename as a parameter of cpdf_open().

See also cpdf_output_buffer() and cpdf_open().