Requesting NAME OF FORM by php

Question

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Requesting NAME OF FORM by php

I have a form with no captcha and this is submitting by POST method.I am fearing for Spamming. User can spam my database by ajax. How will i protect it by Spammers.ANy idea.. thanks in advance.

Answer 1

Use a simple addition field.

Ask something like: 2 + 3=

And verify that the value is 5 using PHP.

Its a very simplistic captcha, but its better than nothing. Can easily be cracked though.