สอบถามผู้รู้ค่ะ ติด error Catcha Code แบบนี้ แก้อย่างไรคะ

     $im = ImageCreate($width, $height);
     $grey = ImageColorAllocate($im, 230, 230, 230);
     $black = ImageColorAllocate($im, 0, 0, 0);
   
     $font = "font/Tahoma.ttf";
     $text_bbox = ImageTTFBBox($font_size, 0,$font, $text);
     $image_centerx = $width / 2;
     $image_centery = $height / 2;
     $text_x = $image_centerx - round(($text_bbox[4]/2));
     $text_y = $image_centery + 6;
      
     ImageTTFText($im, $font_size, 0, $text_x, $text_y, $black,$font, $text);
     ImagePng($im,"image-code.png");
     ImageDestroy ($im);