Get the index of the specified color + alpha
Syntax
imagecolorexactalpha(
GdImage $image,
int $red,
int $green,
int $blue,
int $alpha
): intParameters
imageA GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
redValue of red component.
greenValue of green component.
blueValue of blue component.
alphaA value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
Return
Returns the index of the specified color+alpha in the palette of the image, or -1 if the color does not exist.
Examples
1 · return
<? $width = 100; $height = 100; $image = imagecreatetruecolor($width, $height); $red = 255; $green = 128; $blue = 0; $alpha = 64; $return = imagecolorexactalpha($image, $red, $green, $blue, $alpha); echo $return; ?>
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