(PHP 5 <= 5.3.0, PECL ming SVN)
SWFGradient::addEntry — Adds an entry to the gradient list
$ratio
   , int $red
   , int $green
   , int $blue
   [, int $alpha = 255
  ] )This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.
   swfgradient::addentry() adds an entry to the gradient list. 
   ratio is a number between 0 and 1 indicating where in 
   the gradient this color appears. Thou shalt add entries in order of increasing ratio. 
  
   red, green, blue
   is a color (RGB mode).
  
No value is returned.