(PHP 4, PECL pdflib >= 1.0.0)
PDF_setgray_stroke — Set stroke color to gray [deprecated]
Sets the current stroke color to a gray value between 0 and 1 inclusive. Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
This function is deprecated since PDFlib version 4, use PDF_setcolor() instead.