cpdf_setgray_fill

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

The cpdf_setgray_fill() function sets the current gray value to fill a path. 如果成功则返回 TRUE,失败则返回 FALSE

See also cpdf_setrgbcolor_fill().