imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

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

Returns the index of the color in the palette of the image which is "closest" to the specified RGB value and alpha level.

image: An image resource, returned by one of the image creation functions, such as 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 the index of the closest color in the palette.

Замечание: Эта функция нуждается в GD версии 2.0.1 или выше.

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