$imageLibrary public property (available since version 2.0.7) The

$skipOnEmpty public property Whether to skip this validator if

$testLimit public property How many times should the same CAPTCHA

setHttpHeaders() protected method Sets the HTTP headers

renderImageByGD() protected method Renders the CAPTCHA

$transparent public property Whether to use transparent background

$backColor public property The background color. For example,

$depends public property public

$js public property public

$fontFile public property The TrueType font file. This can be