Php validating text input
Server-side validation incorporates code validation into a form handler. NET application on the server that provides the functionality that your form needs for processing after a customer has submitted it.Because the code is stored on the server, server-side validation requires a roundtrip to the server.Microsoft® Office Front Page® 2003 allows you to create some custom validation within the form feature.
If you use PHP (and you should), this task is significantly simplified by the PEAR Validate class, which provides ready-made methods for common user validation tasks.
First and foremost: you’ll need a working knowledge of PHP to read this post.
But not much is needed since this is intended for beginners.
Most experienced Web developers are acutely aware that the single most vulnerable point of any Web application is its forms.
This is because Web forms typically directly interface with the application's database or calculation algorithms, and so a small error in user input can easily cascade into widespread data corruption problems.
PHP security isn’t just an option anymore; it’s a necessity.