In email form how do we say "must be equal to X"?

Hi, we are getting a lot of spam through our PHP Feedback form, and have set
up a new field 'prove you're human', asking them to do some simple maths.

What is the command for the PHP script itself, to say "this field must be
equal to 9 or return the error page"?

Thanks!

Matt

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1 18th November 21:27 matthew wilson External User Posts: 1	In email form how do we say "must be equal to X"? Hi, we are getting a lot of spam through our PHP Feedback form, and have set up a new field 'prove you're human', asking them to do some simple maths. What is the command for the PHP script itself, to say "this field must be equal to 9 or return the error page"? Thanks! Matt