Employing comprehensive data sanitization

It is very important for all websites to filter all user inputs and to exploit works because of weak input filtering or no filtering at all. You can also call this validation. For example, if the input field is supposed to be a cell phone number, you can certainly validate that field to make sure that it contains only numbers and, of course, is the length of a cell phone number. This will not just protect your application from SQLi but it will also protect you from undesired behavior. 

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