Category: 12. PHP

One of the common features required in a typical PHP web application is the provision of letting the user upload files. Uploading files from a client is very easy in PHP. In this chapter, we shall learn how to use PHP script for the file upload process. The process of uploading a file follows these…

Since PHP is mostly used for web application development, the data sent by the browser client is mainly with the GET and POST types of HTTP request methods. The HTTP protocol also defines other methods for sending the request to the server. They are PUT, DELETE, HEAD and OPTIONS (in addition to GET and POST…

You can include the content of a PHP file into another PHP file before the server executes it. There are two PHP functions which can be used to included one PHP file into another PHP file. This is a strong point of PHP which helps in creating functions, headers, footers, or elements that can be…

This chapter puts all the concepts of form validation and extraction of HTML form data into PHP code. The complete form handling code given below has three sections: A PHP code section in the beginning that looks for any validation errors when the form is submitted, the HTML form with various elements such as text…

PHP provides two alternatives for validating the form data items which are strings but are expected to be a representation of Email ID or a URL. One way to check the form element contains email/URL is with the use of RegEx (regular expressions), and the other, more convenient approach is to use filter_var() function. Let us…

The term “Form Validation” refers to the process of ascertaining if the data entered by the user in various form elements is acceptable for further processing. Validation of data before its subsequent processing avoids possible exceptions and runtime errors. Validation can be done both on the client-side and on the server-side. When the client submits…

HTML Forms play an important role in PHP web applications. Although a webpage composed purely with HTML is a static webpage, the HTML form component is an important feature that helps in bringing interactivity and rendering dynamic content. PHP’s form handling functionality can validate data collected from the user, before processing. An HTML Form is a…

PHP is a server-side scripting language that is used to create dynamic webpages. It is one of the most popular programming languages for web development. This chapter aims to let you get familiarized with certain important concepts of web application development using PHP. A web-based application is a collection of webpages. A webpage is mainly…

The release of version 7.0 is an important milestone in the evolution of PHP language, when a lot of new features were introduced. The feature of Anonymous class was also made available in PHP version 7.0. As the term “anonymous” suggests, it is a class without a (programmer declared) name. The usual practice is to…

A PHP statement such as “$obj1 = $obj2” merely creates another reference to the same object in memory. Hence, changes in attribute reflect both in original and duplicate object. The clone keyword in PHP creates a shallow copy of an object. Changes in the original object do not reflect in the shallow copy. Example Take a look…