程式設計@筆記

從GD標誌顏色獲取

<?php

// Setup an image
$im = imagecreatefrompng('./gdlogo.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);
?>
以上例程的輸出類似於：

Array
(
[0] => 16711680
[1] => 2130706432
[2] => 939524095
[3] => 342163252
)