RGB Variable With PHP

[daredevil14]

I am trying to put an RGB value as a variable and then use it somewhere else... here's an example :

switch ( $cols -> textcolour )
  {
  case "black" : $cols -> textcolour = 0,0,0;
  break;
  //...
  }

and then :

$pdf -> SetTextColor($cols->textcolour);

it is not working, and if i put (int) before it, it wont work too, nor if i string the RGB value... any help ?

what i want from the final result is for example :

$pdf -> SetTextColor(0,0,0);

[NogDog]

You could probably do something with [man]eval/man, but as the saying goes: "If the answer is eval(), you're probably asking the wrong question." The better solution might be to have your SetTextColor() method accept an array. Or you could use [man]func_num_args/man and its related functions to allow the method to accept a variable number of args: if one arg and it is an array, get the colors from the array; if 3 scalar args use them for the rgb colors; else throw an exception.

[daredevil14]

i tried doing this :

$cols -> textcolour = sprintf("%s","255,255,255");

and then replacing it... but it is not working... If i output the above variable, it gives me what i want... so what's the problem ?

[NogDog]

Without knowing the definition of the class being used for the $cols object, it's a bit difficult to tell. Is this a custom class of yours, some built-in PHP class or a 3rd-party class you are using?

[daredevil14]

It is a FPDF Class ( free third party class used for generating full free PDFs )... yeah i'll take a look at its definition...

[NogDog]

It wants 3 separate args.. If you just try to enter a string such as "0,122,255", you are only supplying one arg. You either need to use eval() (which is non-optimal, in my opinion):

$color = "0,122,255";
eval('$cols->SetTextColor('.$color.');');

Use 3 variables:

$red = 0;
$green = 122;
$blue = 255;
$cols->SetTextColor($red, $green, $blue);

Or else extend the class to allow entering a, string, e.g.:

class MyFPDF extends FPDF
{
   function MySetTextColor($color)
   {
      $colors = explode(',', $color);
      if(count($colors != 3)
      {
         user_error("invalid parameter '$color'");
         return false;
      }
      $this->SetTextColor((int)$rgb[0], (int)$rgb[1], (int)$rgb[2]);
      return true;
   }
}

// sample usage:
$fpdf = new MyFPDF();
$colors = "0,122,255";
$fpdf->MySetTextColor($colors);

[daredevil14]

thanks alot...