php

Good Day!!!

In this tutorial, we are going to learn PHP function, and it's called "checkdate()". The checkdate() function returns true if the specified date is valid, and false otherwise.

A date is valid if:

• month - is between 1 and 12 inclusive
• day - is within the allowed number of days for the particular month
• year - is between 1 and 32767 inclusive

This function has this form:

Validating a form using a JavaScript gives convenience to your visitors by avoiding page reload and other features that we discuss on our previous tutorial called Validate Login Page Using JavaScript. But validating a form using JavaScript alone is not safe. One reason is if the JavaScript is not enabled in the web browser.

This is a continuation of the topic that I have discuss yesterday on How to Create Secure Login Page in PHP/MySQL.

In our previous tutorial we discuss on how to create a secure registration page using three different approaches.

In our last two articles, we discuss on how to create a registration page using mysql and mysqli extension and how to secure it using mysql_real_escape_string or mysqli_real_escape_string.

This time we will modify our code to use PDO instead of mysql or mysqli extension.

mysqli extension works differently compared to mysql extension. The 'i' stands for improved. Which means that it has some features that cannot be found in mysql extension. There are two approach in using mysqli extension. They are Object Oriented style and Procedural style. If you are migrating your old PHP file to mysqli extension, I prefer you use the procedural style. It's very easy to convert it to mysqli this way. Looking at the example in our previous tutorial.