PHP SLIM : How to return dynamically generated images -

i trying display dynamically generated image slim controller getting blank screen. thanks.

public function texttoimage($request, $response, $args) {      // text draw     $text = "hello world";     $length=strlen($text);     // create image      $im = imagecreatetruecolor($length*12, 30);      // create colors     $white = imagecolorallocate($im, 255, 255, 255);     $grey = imagecolorallocate($im, 128, 128, 128);     $black = imagecolorallocate($im, 44, 62, 80);     $boxcolor=imagecolorallocate($im, 95, 128, 149);      $font = 'helvetica.ttf';     imagefilledrectangle($im, 0, 0, $length*9+$capitaladjust, 29, $white);     imagettftext($im, 13, 0, 0, 20, $black, $font, $text);      $response->getbody()->write(base64_encode($im));     $response = $response->withheader('content-type', 'image/png');          return $response;  } 

base64 encoding $im not create valid png file. try using imgpng , sending raw contents of png file creates.

the code this:

ob_start(); imagepng($im); $data = ob_get_contents(); ob_end_clean();  $response->getbody()->write($data); $response = $response->withheader('content-type', 'image/png');      return $response;