need help allocating string to a specific color

[zchikmhagnet]

a php beginner/noob right here.. I need to allocate a string to a particular color..

here is the code

	for ($x = 0; $x < $width; $x++) {
	for ($y = 0; $y < $height; $y++) {

	    // get the color at this pixel in the resampled image
		$colorIndex = ImageColorAt($img, $x, $height - 1 - $y);
            $r = ($colorIndex >> 16);
            $g = ($colorIndex >>  & 255;
            $b = $colorIndex & 255;


            $color = ImageColorsForIndex($img, $colorIndex);

            // change back to indexed color mode (since that's all the PDF generator knows)
		$pdf->setColor($color['red'] / 255, $color['green'] / 255, $color['blue'] / 255);

          // symbol per color
         switch ($color) {
    case ($r = 000 and $g = 000 and $b = 000) :
        $assignedsymbol = "00";
        break;
    case ($r = 255 and $g = 255 and $b = 255) :
        $assignedsymbol = "89";
        break;
    case ($r = 255 and $g = 000 and $b = 000) :
        $assignedsymbol = "02";
        break;
    case ($r = 000 and $g = 255 and $b = 000) :
        $assignedsymbol = "03";
        break;
    case ($r = 000 and $g = 000 and $b = 255) :
        $assignedsymbol = "04";
        break;
    default:
        $assignedsymbol == "0";

}
          // generate the TEXT "grid" box
                 $pdf->addtext($baseX + ($box_hz_size * $x),
								$baseY + ($box_vt_size * $y),
								9, $assignedsymbol);

	}

}

 

please help me..  I have doubts on my switch case.. and I cant get a value to be stored..

 

 

thanks!!

[jl5501]

You switch statement is not correct.

 

you have

 

switch($color)

{

}

 

which is fine but

 

each case has to be a test for a value of $color as that is what you are switching on. A case statement is not an if statement of other variables, so you will need your rgb values in one variable that can be checked.

 

[zchikmhagnet]

Thanks.. I'll keep that in mind..

 

I forgot to mention that it does recognize only the color white (255 255 255)so in an image that a character would represent a particular color everything is interpreted as white..