What is PHP?
PHP is short for PHP Hypertext Preprocessor. It enables developers to create dynamic websites that are used to develop web applications. In contrast to static websites, the content can change at any time due to user actions or data updates. PHP particularly supports the simple evaluation of forms with which a user can send data to a website.
It enables collaboration with many different database systems; MySQL is mainly well supported, for example. Both components work together as best as possible. Many content management systems are programmed in PHP and save their data in a MySQL database. Compared to other programming languages, PHP offers many advantages
Here is a great example to understand the big difference
Imagine that you run an online bookstore.
There is a function on the search page that allows you to search for the ISBN.
A valid ISBN is a self-checked number, so an algorithm can be used to check whether an entered sequence of digits can be an ISBN at all. The same applies, for example, to barcodes for sales packaging.
If a number is now entered there, it makes sense to check whether this can be valid directly. However, it does not make sense to send this to the server as a request until this has been clarified.
If a barcode or an ISBN has a number rotator, it is likely that the number cannot be a valid barcode / ISBN, since neighboring digits are weighted differently in the check digit.
It makes no sense to send a request to the server if it can be ruled out beforehand that this number is valid.
This has three advantages:
- The server is not so often burdened with requests that may pass nonsensical values.
- After processing the ISBN check, the page does not have to be rebuilt!
- There is no communication between the server and the client at all – which, like 2nd, proves to be an advantage, especially with slow Internet connections.
It’s different from PHP. PHP is only ever executed on the server. Once the page is loaded and you want to implement a function, a new request must be sent to the server. This causes traffic and requires a new page structure every time. This can take a long time, especially if many or large graphics are displayed on the page. All functions with PHP are processed when the browser shows the page.