Php/docs/function.imagecolorexact
imagecolorexact
(PHP 4, PHP 5, PHP 7)
imagecolorexact — Get the index of the specified color
Description
imagecolorexact
( resource $image
, int $red
, int $green
, int $blue
) : int
Returns the index of the specified color in the palette of the image.
If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.
Parameters
image- An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
red- Value of red component.
green- Value of green component.
blue- Value of blue component.
Return Values
Returns the index of the specified color in the palette, or -1 if the color does not exist.
Examples
Example #1 Get colors from the GD logo
<?php// Setup an image$im = imagecreatefrompng('./gdlogo.png');$colors = Array();$colors[] = imagecolorexact($im, 255, 0, 0);$colors[] = imagecolorexact($im, 0, 0, 0);$colors[] = imagecolorexact($im, 255, 255, 255);$colors[] = imagecolorexact($im, 100, 255, 52);print_r($colors);// Free from memoryimagedestroy($im);?>
The above example will output something similar to:
Array
(
[0] => 16711680
[1] => 0
[2] => 16777215
[3] => 6618932
)
