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<?php
        if(isset($argv))
        {
              $env = "CLI";
        }
        else
        {
              $env = "WEB";
        }
        
        print wordwrap("Some version of the GD graphics library have a bug in their handling of Alpha channels. Unfortunately, Weathermap uses these to draw Nodes.");
        print ($env=='CLI'?"\n\n":"\n<p>");
        
        print wordwrap("This program will test if your PHP installation is using a buggy GD library.");
        print ($env=='CLI'?"\n\n":"\n<p>");
        
        print wordwrap("If you are, you should either use PHP's built-in (aka 'bundled') GD library, or update to GD Version 2.0.34 or newer. Weathermap REQUIRES working Alpha support.");
        print ($env=='CLI'?"\n\n":"\n<p>");
        
        print wordwrap("Let's see if you have the GD transparency bug...");
        print ($env=='CLI'?"\n\n":"\n<p>");
        print wordwrap("If you see no more output, or a segfault, then you do, and you'll need to upgrade.");
        print ($env=='CLI'?"\n\n":"\n<p>");
        print wordwrap("If you get other errors, like 'undefined function', then run check.php to\nmake sure that your PHP installation is otherwise OK.");
                     print ($env=='CLI'?"\n\n":"\n<p>");
        print "Here we go...";
        print ($env=='CLI'?"\n\n":"\n<p>");
        
        // make sure even the affected folks can see the explanation
        ob_flush();
        flush();
        
        $temp_width = 10;
        $temp_height = 10;
        
        $node_im=imagecreatetruecolor($temp_width,$temp_height );
        imageSaveAlpha($node_im, TRUE);
        $nothing=imagecolorallocatealpha($node_im,128,0,0,127);
        imagefill($node_im, 0, 0, $nothing);
        imagedestroy($node_im);
        
        print "...nope. We got past the risky part, so that's good.\nYour GD library looks healthy.\n";
        print ($env=='CLI'?"\n":"\n<p>");
?>