Invisible CAPTCHA | Archived ExpressionEngine Community Support Forums

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Invisible CAPTCHA

nevsie

Posted: 10 February 2010 02:29 PM

[ Ignore ] [ # 19 ]

Lab Technician

Total Posts: 1433

Joined 03-05-2008

yeah my tests show very different values held in the captcha table in the database to that displayed on the form - so i am guessing something i going wrong in the middle -

I don;t have time to debug now - maybe another time.

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swany10012

Posted: 02 March 2010 05:35 PM

[ Ignore ] [ # 20 ]

Grad Student

Total Posts: 45

Joined 02-10-2008

I am getting a javascript syntax error on the js that the extension generates. Is anyone else experiencing this issue?

//<![CDATA[
var _51=function(_16, _87, _138){this._138=_138||"captcha";this._16=_16;this._87=_87;this._38();this._43();};_51.prototype={_138:null,_16:null,_87:null,_38:function(){var _106=document.getElementById(this._138+"-container");if(_106)},_43:function(){var _188=document.getElementById(this._138);if(_188){_188.value=((this._16.charCodeAt(0)-70)+(this._87.charCodeAt(0)-110));}}};function _51(){new _51("G","u","");}var _48=window.onload;if(typeof window.onload!="function")else{window.onload=function(){_48();_51();}}
//]]> 

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Kevin Evans

Posted: 26 March 2010 01:02 PM

[ Ignore ] [ # 21 ]

Lab Assistant

Total Posts: 286

Joined 02-25-2006

Will this extension work with the Freeform module?

thanks!

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Pv Ledoux

Posted: 04 May 2010 08:07 AM

[ Ignore ] [ # 22 ]

Lab Assistant

Total Posts: 130

Joined 02-20-2008

Hi,

just for info, it seems that it’s not compatible with PHP 5.3.

Severity: 8192
Message: Assigning the return value of new by reference is deprecated
Filename: extensions/ext.invisible_captcha.php
Line Number: 85 

I corrected it by removing the byref assignment.

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dashard

Posted: 10 May 2010 12:04 PM

[ Ignore ] [ # 23 ]

Grad Student

Total Posts: 74

Joined 09-23-2006

OK. I’ve read through this all and found no answer to my question, which is very simply: “What am I missing?” If there’s a CAPTCHA that is both invisible AND answers itself, how does that stop spammy registrations (I’m using it for registrations)??

What am I missing? Is the theory that a spambot doesn’t *have* javascript and therefore gets halted? If so, what about the low-tech spammer who actually visits your site? He gets through?

In the words of Ricky Riccardo - can someone please ‘splain this to me?

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nclud

Posted: 13 May 2010 12:34 PM

[ Ignore ] [ # 24 ]

Summer Student

Total Posts: 2

Joined 01-06-2009

Thanks for this extension, It’s perfect for my needs. Only problem is that about 1 in ~200 page loads, I see a collision between the random numbers it generates and the packed js function names, for example:

//<![CDATA[
var _76=function(_0, _59, _170){this._170=_170||"captcha";this._0=_0;this._59=_59;this._170();this._173();};_76.prototype={_170:null,_0:null,_59:null,_170:function(){var _2=document.getElementById(this._170+"-container");if(_2){_2.style.display="none"}},_173:function(){var _55=document.getElementById(this._170);if(_55){_55.value=((this._0.charCodeAt(0)-65)+(this._59.charCodeAt(0)-111));}}};function _83(){new _76("B","x","");}var _124=window.onload;if(typeof window.onload!="function"){window.onload=_83}else{window.onload=function(){_124();_83();}}
//]]> 

Any thoughts on a workaround for this? I’m unfamiliar with jsPack.

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nclud

Posted: 13 May 2010 01:12 PM

[ Ignore ] [ # 25 ]

Summer Student

Total Posts: 2

Joined 01-06-2009

Haven’t taken a close look at this jsPack class yet, but it looks like there might be a typo in _encodePrivate():

// special _chars
    function _encodePrivate($charCode) {
        static $store = array();

        while (true) {
            // randomize the code some
            $code = mt_rand(0, 199);

            if (!isset($static[$code])) {
                $static[$code] = true;
                break;
            }
        }

        return "_" . $code;
    } 

Shouldn’t those two references to $static[$code] instead be $store[$code] ?

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