Get the index of the specified color + alpha in PHP
Description
The following code shows how to get the index of the specified color + alpha.
Example
<?php//from w w w. j av a 2 s . co m
// Setup an image
$im = imagecreatefrompng('./test.png');
$colors = Array();
$colors[] = imagecolorexactalpha($im, 255, 0, 0, 0);
$colors[] = imagecolorexactalpha($im, 0, 0, 0, 127);
$colors[] = imagecolorexactalpha($im, 255, 255, 255, 55);
$colors[] = imagecolorexactalpha($im, 100, 255, 52, 20);
print_r($colors);
// Free from memory
imagedestroy($im);
?>
The code above generates the following result.
