Find out the number of colors in an image's palette
Syntax
imagecolorstotal(
GdImage $image
): intParameters
imageA GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
Return
Returns the number of colors in the specified image's palette or 0 for truecolor images.
Examples
1 · palette
<? $width = 100; $height = 100; $image = imagecreate($width, $height); $red = 0; $green = 0; $blue = 0; imagecolorallocate($image, $red, $green, $blue); $return = imagecolorstotal($image); echo $return; ?>
1
2 · truecolor
<? $width = 100; $height = 100; $image = imagecreatetruecolor($width, $height); $return = imagecolorstotal($image); echo $return; ?>
0
