PHP Form Validation

Since the other thread looks at validation of data with JavaScript, what sort of validation checks should you do with PHP then?

The most important thing people always talk about is to ensure that if you are going to put the data into a database that you ensure that you format it as you want to, so for instance if you want to get rid of any formatting that you call something like strip_tags for instance.

What other checks and tips are there for validating your data to ensure that it's in the format you want it in?

Re : PHP Form Validation

Vh

Re : PHP Form Validation

With PHP you should check that the correct length of field is entered and that the correct type of data (alphanumeric).

Strip out any tags if you don't want them, trim to remove whitespace, check that it is safe to put in database with mysql_real_escape_string then process accordingly.