Forms ¶

Forms are used when requesting data from the user to perform an action. Common forms often found on websites are:

• 🔓 a login form
• 🧑 a sign-in form
• 🔑 a password forgot form
• 💵 a checkout form
• 🔎 a search/filter form
• 🤖 a captcha form

There are two HTTP methods commonly used in forms: GET and POST. There is a semantic use 🗺️: GET is used by forms "getting" data from the server (search/filter forms), POST is used by forms creating something server-side (all others forms). In practice, it's up to the developer.

Forms are commonly involving 4 languages:

• HTML: the visual and some constraints (range/required/...)
• CSS: to make nicer forms
• JavaScript: to validate forms/advanced constraints
• PHP: to validate and process forms

The languages involved may change, but there is always a validation that should be done server-side 📌, such as in PHP, as client-side validations can be bypassed, and they are only used to provide a better experience for normal users.