(PHP 3 >= 3.0.8, PHP 4, PHP 5 <= 5.0.4)
Sets the scaling factor in both directions.
pdf_document
The document handle, returned by cpdf_open().
x_scale
The X scale percent to set. Default to 0.0
y_scale
The Y scale percent to set. Default to 0.0
如果成功则返回 TRUE,失败则返回 FALSE。