(PHP 4 >= 4.0.6, PHP 5)
imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha
( resource $image
, int $red
, int $green
, int $blue
, int $alpha
An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
Value of red component.
Value of green component.
Value of blue component.
A value between 0 and 127.
0 indicates completely opaque while
127 indicates completely transparent.
The colors parameters are integers between 0 and 255 or hexadecimals
between 0x00 and 0xFF.
Returns the index of the closest color in the palette.
Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).