Description: Form validation is the process of verifying whether the data entered in a form is correct and meets certain established criteria. This process is fundamental in web development as it ensures that the information provided by users is valid and useful for the system. Validation can be performed both on the client side and the server side. On the client side, technologies like JavaScript and frameworks like Vue.js are used to provide a smoother user experience, allowing errors to be detected before the data is sent to the server. On the other hand, server-side validation, commonly implemented in languages like PHP and Python, ensures that the data is checked again before being processed or stored, thus protecting the integrity of the database and preventing potential attacks like SQL injection. Form validation not only improves data quality but also contributes to the security and usability of web applications, providing immediate feedback to users and avoiding the frustration of submitting forms with errors. In summary, form validation is an essential component in the development of web applications, ensuring that the entered data is accurate and secure.
