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imagecolorexactalpha

Description

The imagecolorexactalpha of Image for PHP get the index of the specified color + alpha.

Syntax

imagecolorexactalpha(
    GdImage $image,
    int $red,
    int $green,
    int $blue,
    int $alpha
): int

Parameters

image

A GdImage object, 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.

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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