imagecolorresolvealpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorresolvealpha — Get the index of the specified color + alpha or its closest possible alternative

int imagecolorresolvealpha ( resource $image , int $red , int $green , int $blue , int $alpha )

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

image: Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
red: Value of red component
green: Value of green component
blue: Value of blue component
alpha: 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 a color index.

Nota: Questa funzione necessita di GD 2.0.1 o successivi.