Validating user input php
Luckily, with the release of PHP 5, you can easily validate email addresses using the function.
One of the features of HTML5 is the ability to validate most user data without relying on scripts.
This is done using validation attributes on form elements, which allow you to specify rules for a form input like whether a value needs to be filled in, the minimum and maximum length of the data, whether it needs to be a number, an email address, etc., and a pattern that it must match.
If so, it allows it to be submitted to the server and (usually) saved in a database; if not, it gives you error messages to explain what you've done wrong (provided you've done it right).
Form validation can be implemented in a number of different ways.
In this article, we will aim to provide PHP solutions which will validate the most common fields used in website development:, Testuser1 is the local part of the email address while is the domain name.
Below are the specifications necessary for checking email address validity.
If you do not validate the input data, malicious users can enter other types of characters into the form to hack your My SQL database.
Serious website security issues, such as My SQL injection and malware injection, result from improper form input validation.
However, a lot of website forms do not have input validation.
"Input validation" is the process of double checking form data input to ensure they are the correct data the server needs to process.
You can find great resources relating to this task at: .