Category: PHP

PHP version 7 extends the scalar type declaration feature to the return value of a function also. As per this new provision, the return type declaration specifies the type of value that a function should return. We can declare the following types for return types − To implement the return type declaration, a function is…

The feature of providing type hints has been in PHP since version 5. Type hinting refers to the practice of providing the data type of a parameter in the function definition. Before PHP 7, it was possible to use only the array, callable, and class for type hints in a function. PHP 7 onward, you can also…

The built-in library of PHP has a wide range of functions that helps in programmatically handling and manipulating date and time information. Date and Time objects in PHP can be created by passing in a string presentation of date/time information, or from the current system’s time. PHP provides the DateTime class that defines a number…

MySQL is a popular choice as a backend database for PHP powered web applications. In this chapter, we shall learn to develop a login page for a PHP application that authenticates the given username and password. You should have a web server having PHP and MySQL installed for experimenting with the example discussed in this…

PayPal is a payment processing system. We can integrate PayPal with websites by using with PHP. PayPal Integration File System PayPal integration file system included four files as shown below − The user has to download a PayPal SDK file from here and exact a zip file. The zip file contains four PHP files. We…

Users can be asked to log into a web application with the help of Social media login, also called SSO. This way users need not create a new account. Instead, users can use their existing social media account information to log in. Some examples of social media login include: Google, Facebook, LinkedIn, Apple. In this…

A typical PHP web application authenticates the user before logging in, by asking his credentials such as username and password. The credentials are then checked against the user data available with the server. In this example, the user data is available in the form of an associative array. The following PHP Login script is explained below − HTML…

The DOM extension in PHP comes with extensive functionality with which we can perform various operations on XML and HTML documents. We can dynamically construct a DOM object, load a DOM document from a HTML file or a string with HTML tag tree. We can also save the DOM document to a XML file, or…

PHP has the XML parser extension enabled by default in the php.ini settings file. This parser implements SAX API, which is an event-based parsing algorithm. An event-based parser doesnt load the entire XML document in the memory. instead, it reads in one node at a time. The parser allows you to interact with in real…

The SimpleXML extension of PHP provides a very simple and easy to use toolset to convert XML to an object that can be processed with normal property selectors and array iterators. It is a tree_based parser, and works well with simple XML files, but may face issues when working with larger and complex XML documents.…