.PNG background is white, need transparent? - PHP GD

[saamde]

So I'm new to PHP GD, I cant understand why the PNG image will not go transparent, it's just showing a white background.

 

Could anyone help me out with this?

 

 

 

<?php
$hour = date('H');
if ($hour  > 4 && $hour < 12) {
        $image = "day.png";
} elseif ($hour  > 11 && $hour < 19) {
         $image = "day.png";
} else {
         $image = "night.png";
}
$image = imagecreatefrompng( "$image" );
if (!$image) { /* See if it failed */
        header("(anti-spam-(anti-spam-content-type:)) $extList");
        $im = imagecreatetruecolor (150, 30); /* Create a blank image */
        $bgc = imagecolorallocate ($im, 255, 255, 200);
        $tc = imagecolorallocate ($im, 0, 0, 0);
        imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);
        /* Output an errmsg */
        imagestring ($im, 1, 5, 5, "Error loading Image", $tc);
        imagepng($im);
        imagedestroy($im);
        die();
    }
header("(anti-spam-(anti-spam-content-type:)) image/png");
imagepng($image);
imagedestroy($image);
?>

Thanks, Sam

[Barand]

You need to call imagecolortransparent(). EG

imagecolortransparent ($im, imagecolorat($im,0,0));

which sets the transparent color to the color of the pixel at 0,0 (assuming that is a background colored pixel)

[fastsol]

I have had luck using the imagealphablending($var, false) and imagesavealpha($var, true) in that order right after the imagecreatetruecolor().  The $var in those you would change to your appropriate var being used.

Edited May 15, 2014 by fastsol