How can i increase the font size of codeigniter captcha helper
You are changing the correct parameter, whether in the core file or the application/helpers file.
Double check the font that you are using. Some fonts have one size and that is it. The default font file (texb.ttf) has only one size (? I think...).
I am using the following configuration:
//----- Captcha Implementation -----$this->load->helper('captcha');$captchaSetup = array( 'img_path' => './captcha/', 'img_url' => base_url()."captcha/", 'font_path' => './assets/fonts/E004007T.TTF', 'img_width' => 250, 'img_height' => 50, 'expiration' => 7200);$capData['cap'] = create_captcha($captchaSetup);Pick a font file and place it in the fonts folder and try it out.
You may use "true type" fonts in captha's font_path to get a bigger size. Try to set path/to/your/ttfont.ttf in font_path and then pass a greater value to font_size. It should work!