PHP/Graphics Image/imagecolorallocatealpha
Using imagecolorallocatealpha
<source lang="html4strict">
<?php
define("WIDTH", 300); define("HEIGHT", 300); $img = imagecreatetruecolor(WIDTH, HEIGHT); $white = imagecolorallocate($img, 0xFF, 0xFF, 0xFF); $yellow = imagecolorallocate($img, 0xFF, 0xFF, 00); $red = imagecolorallocate($img, 0xFF, 0, 0); $blue_t = imagecolorallocatealpha($img, 0, 0, 0xFF, 0x40); imagefill($img, 1, 1, $white); imageline($img, 0,0, WIDTH-1, HEIGHT-1, $blue_t); imagefilledrectangle($img, (WIDTH/2)-50, (HEIGHT/2)-50,(WIDTH/2)+50, (HEIGHT/2)+50, $yellow); header("Content-Type: image/png"); imagepng($img);
?>
</source>