Opencart, OC 1.5.1.3, captcha error

问题

OC 1.5.1.3, the Captcha image doesn't show on none of these pages:

product / review section
contact page
by accessing this http://www.directmall.co.uk/index.php?route=information/contact/captcha (the direct link which should generate the image)

I can't see any errors (Apache logs / error.txt file). I can't see any spaces within the language files - in fact I've redownloaded the entire EN package just to make sure..

I suspect a broken dependency (even if I have GD.. there must be something else..); disabled entirely caching - need assistance!

Back in 2009 I've found trails of such errors on forums but it seems there was a language-file problem, meaning trails of spaces were sending the page headers earlier than normal - but I've checked most of the files I thought to be involved and I've cleaned all the extra spaces - with no result.

Thanks, Bogdan

回答1:

FYI I had this same problem and this solution (change to system\library\captcha.php) did make the captcha image display successfully and the form passes validation:

function getCode(){
$out = ob_get_contents();
$out = str_replace(array("\n", "\r", "\t", " "), "", $this->code);
ob_end_clean();

    return $out;
}

回答2:

For OC 1.5.* Go to

system\library\captcha.php

Find function getCode() Replace this function to

function getCode(){
$code= ob_get_contents();
$code= str_replace(array("\n", "\r", "\t", " "), "", $this->code);
ob_end_clean()    return $code; }

Now For OC 2.1.* Go to

Catalog/controller/captcha/basic-captcha

Find $this->session->data['captcha'] = substr(sha1(mt_rand()), 17, 6);

place below code after this

    $code= ob_get_contents();
    $code= str_replace(array("\n", "\r", "\t", " "), "",$this->session->data['captcha']);
    ob_end_clean();
    $this->session->data['captcha'] = $code;

And For OC 2.3.* Go to

Catalog/controller/Extension/captcha/basic-captcha.php Find $this->session->data['captcha'] = substr(sha1(mt_rand()), 17, 6); Place below code after this

    $code= ob_get_contents();
    $code= str_replace(array("\n", "\r", "\t", " "), "",$this->session->data['captcha']);
    ob_end_clean();
    $this->session->data['captcha'] = $code;

Its helpfull !

回答3:

Doing a view-source:http://www.directmall.co.uk/index.php?route=information/contact/captcha on Google Chrome showed me that there's a whitespace at the front of the content of the image.

You might have accidentally outputted "\n" somewhere in your code before <?php or after ?>,

回答4:

you should add this code after your getcode function (captcha.php in the library)

$out = ob_get_contents();
$out = str_replace(array("\n", "\r", "\t", " "), "", $input);
ob_end_clean();

回答5:

Just to clarify for anyone looking for this. system/library/captcha.php

change function line 11 getCode()

to this:

function getCode(){
    //return $this->code;
    $out = ob_get_contents();
            $out = str_replace(array("\n", "\r", "\t", " "), "", $input);
            ob_end_clean();

            return $out;
}

This ought to do it.

回答6:

I had the same problem and i my particular case, this was the solution. Probably when fixing product.php some blank lines were introduced, which are extremely difficult to debug. In any case this code :

$out = ob_get_contents();
$out = str_replace(array("\n", "\r", "\t", " "), "", $input);
ob_end_clean();

return $out;

did fix it, since it cleans anything that should not be there.

hope it helps anyone.

回答7:

I came across this issue recently and this common solution (that worked for me before) didn't work:

$out = ob_get_contents();
$out = str_replace(array("\n", "\r", "\t", " "), "", $input);
ob_end_clean();
return $out;

I noticed that the showImage() method in /system/library/captcha.php accesses $this->code directly rather than using its getter, getCode(). That means it's bypassing the function to strip whitespace.

However, modifying the constructor like this did the trick:

function __construct() { 
    $this->code = substr(sha1(mt_rand()), 17, 6); 
    $this->code = str_replace(array("\n", "\r", "\t", " "), "", $this->code);
}

More info and a vQmod extension to apply this fix can be found here: http://www.antropy.co.uk/blog/opencart-captcha-not-working-jfif/

来源：https://stackoverflow.com/questions/8263452/opencart-oc-1-5-1-3-captcha-error

标签

apache

captcha

opencart