The cpdf_place_inline_image() function places an image created with the PHP image functions on the page at position (x_coor, y_coor). The image can be scaled at the same time. 如果成功则返回 TRUE，失败则返回 FALSE。
可选参数 mode 决定单元的长度。如果为 0 或被省略则使用该页指定的默认单元。否则坐标忽略当前单元而使用 postscript 的点来度量。
注: This function is only available if PHP was compiled with the GD Graphics Library 1.3. See the GD extension installation instructions for further information.
See also cpdf_import_jpeg().