title: How to do resize and color change png image in php GD
body: <pre><code>&lt;?php
  createImage(50,50, 0,0, 255);
  function createImage($width, $height, $nR, $nG, $nB)
  {
  $image = imagecreatefrompng("source.png");
  imagealphablending($image, false);  
  imagesavealpha($image, true);       
  
        //resize the image
        $new_image = imagecreatetruecolor($width, $height);
        imagealphablending($new_image, false); 
        imagesavealpha($new_image, true);
        imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, imagesx($image), imagesx($image));
  
      //colorize the image
          $nrgb = str_pad(dechex($nR), 2, '0', STR_PAD_LEFT). str_pad(dechex($nG), 2, '0', STR_PAD_LEFT). str_pad(dechex($nB), 2, '0', STR_PAD_LEFT);              
  
         $newColor = $nrgb;
  
          $c2 = sscanf($newColor ,"%2x%2x%2x");
  
          for($i=0;$i&lt;$width;$i++)
          {
              for($j=0;$j&lt;$height;$j++)
              {
               $cIndex = imagecolorat($new_image,$i,$j);
  
               imagecolorset($new_image,$cIndex,$c2[0],$c2[1],$c2[2]);
              }
          }
  
          header("Content-Type: image/png");
  
          imagepng($new_image,"test.png");
  }
  ?&gt;
  </code></pre>