PHP is a universal scripting language used for websites, with class codes used to create reusable code. Abstract classes are incomplete guides that can be compiled later, allowing for time-efficient coding and specific needs. Classes can be public, protected, or private, while abstract classes can only be public or protected.
Hypertext Preprocessor (PHP) is a scripting language that serves as a universal language used mostly on websites; it talks to databases, creates special effects and logic, and helps with administrative functions such as managing website members. The class code in PHP is used to create a capsule of code that can be used continuously, so the programmer doesn’t need to write the same coding for each instance. The abstract class in PHP, introduced with PHP5, is similar to the regular class but is used when only part of the class code will be needed, while other sections will need to be defined for the specific usage to work properly. The abstract class in PHP can be set to public or protected, but not private.
The way a general class works in PHP is that the programmer gives the class a title, such as “vehicle” if the coding is for a vehicle, which can be called later. Within this class, the programmer will write a series of instructions, such as code to make a vehicle turn left or brake. This type of coding emulates object-oriented coding, or coding that separates pieces of code into objects that have their own sets of code. PHP is of course not an object oriented code but, through this method, it can emulate it.
An abstract class in PHP is constructed in a similar way. The main difference in coding with an abstract class in PHP is that the class structure starts with “abstract class” instead of “class”. When this code is created, it creates an incomplete guide for the program to watch; the incomplete guide can then be compiled later.
The incomplete parts are compiled when the abstract class is called during the program. For example, the vehicle abstract class will have basic instructions that work with all types of vehicles, such as cars, trucks, and motorcycles. Each vehicle, however, has its own specific needs, and the abstract class will allow the programmer to meet these specific needs without having to write separate code for each vehicle. This makes coding more time-efficient, minimizes errors, and makes it easier to make quick changes to every object that uses the abstract class.
PHP classes are specified as public, protected, or private. Each of these labels acts as a shield that limits the visibility of the code based on a user’s access level. Setting a class to public allows any user to view the code, protected status restricts some of the code, and private allows only specified users to view the code. The abstract class in PHP can be set to public or protected, but it cannot be private.
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