client side vs server side
client side vs server side

Client-side validation is performed by JavaScript code that runs in the browser. This code can be added to the page directly, or it can be included in a separate JavaScript file that is referenced by the page.

Server-side validation is performed by a script on the server. This script is usually written in PHP, ASP, or JSP. It can also be written in Perl, Python, or any other language that can process form data.

Both client-side and server-side validation have their advantages and disadvantages.

Client-side validation is faster because the browser doesn’t have to send the data to the server and wait for a response. The disadvantage is that it can be bypassed by disabling JavaScript or using a browser that doesn’t support it.

Server-side validation is more secure because the data is never sent to the browser. The disadvantage is that it is slower because the data has to be sent to the server and processed.

In general, client-side validation is used for tasks that are not critical, such as checking for valid email addresses or zip codes. Server-side validation is used for tasks that are critical, such as checking for valid credit card numbers.

Which is better? That depends on your needs. If security is paramount, then server-side validation is the way to go. If speed is more important, then client-side validation might be a better choice.

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