pdf_shading(3) php man page | unix.com

PDF_SHADING(3)								 1							    PDF_SHADING(3)

PDF_shading - Define blend

SYNOPSIS
       int  PDF_shading  (resource   $pdfdoc, string  $shtype, float  $x0, float  $y0, float  $x1, float  $y1, float  $c1, float  $c2, float  $c3,
       float  $c4, string  $optlist)

DESCRIPTION
	Defines a blend from the current fill color to another color.

	This function requires PDF 1.4 or above.

PHP Documentation Group 													    PDF_SHADING(3)