php - CodeIgniter Captcha Image name

Solution:

You can modify the imagename and set it as you want.

CodeIgniter/system/helpers/captcha_helper.php line 231

// change here. you can set your desired name here.
$img_name = $your_name.'.jpg';
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You can modify it directly (probably not a good idea as updates may overwrite). Or you could create your own helper by copying the original, modifying and putting it in application/helpers.

So, copycaptcha_helper.php into application/helpers, make the changes on line 231, save, and you should be good.

Solution:

according to the manual

http://www.codeigniter.com/user_guide/helpers/captcha_helper.html?highlight=captcha#create_captcha

this function allways return the img tag, the only thing i think you can do is parse it using regular expressions ...

preg_match("/\w+='(\w+.\w+)'/", $input_line, $output_array);
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References

http://php.net/manual/es/function.preg-match.php

http://www.phpliveregex.com/