cpdf_setgray_stroke

Sets drawing color to gray value (PHP 3 >= 3.0.8, PHP 4, PHP 5 <= 5.0.4)
bool cpdf_setgray_stroke ( int pdf_document, float gray_value )

The cpdf_setgray_stroke() function sets the current drawing color to the given gray value. 如果成功则返回 TRUE,失败则返回 FALSE

See also cpdf_setrgbcolor_stroke().