Don't allow user to enter HTML tags in input

Question

I have an input which allows users to enter text, which is then sent using PHP to another page, where it is stored in a database. I have done some simple validation ( checking i

Answer 1

To check try this:

if( preg_match('#^<.>.+$#', $your_value) ){
    echo "NOT GOOD";  // and some error too
}