A very common mistake when first getting in to PHP is to think that isset() and empty() can be used as each others inverse. This is VERY far from the truth and can cause major problems in an application. In this quick article I will explore the differences between isset and empty in PHP
This is a very quick way to make sure people fill out all fields of a form. It is easy to bypass and is in no way a replacement for server-side form validation, but it's a quick and easy way to prevent invalid form data from being submited. All of the code below requires you to include the jQuery JavaScript library. click here for more information about jQuery
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