Chapter 1. What is an objectdoi:10.1515/9783110328202.47Jason W. Brown
A PHP function is like a mini-recipe within your main recipe. It takes in some inputs, performs a specific task, and produces an output. For example, let’s say you want to make a function that calculates the area of a circle. The inputs are the radius of the circle, and the outp...
PHP Tutorials - Herong's Tutorial Examples∟Introduction of Class and Object∟What Is in an Object VariableThis section describes what is in an object variable - An object variable actually contains the object identifier that points to where the object is stored.©...
This section provides a quick description of what is an object in JavaScript and some interesting features on creating and using objects. A tutorial example is also provided.
One feature some languages offer is multiple inheritance. This feature allows an object to extend multiple other types, and thus fulfill them all. As an example, a Horse class could extend both an Animal and a Vehicle class. PHP does not offer multiple inheritance, at least not directly. Wh...
'Word.Application' is not defined "aspnet_compiler.exe" exited with code 1 "Cannot create ActiveX Component" "Exception from HRESULT: 0x800A03EC" Unable to open excel file "Failed to compare two elements in the array." "Object reference not set to an instance of an object" error which po...
A component is a discrete unit of functionality, usually conceived as an “object” or set of objects conforming to an object-oriented model. OK, is that vague enough? Basically it is a chunk of code that does something specific. I included the object-oriented bit because that’s how I ...
PDO::query()– Executes a query and returns the result as a PDOStatement object. Useful for SELECT queries. “`php $stmt = $pdo->query(“SELECT * FROM products”); “` PDO::prepare()– Prepares an SQL statement and returns a PDOStatement object. Does not execute the query yet. Usefu...
MySQL is an open source relational database management system (RDBMS) that’s used to store and manage data. Its reliability, performance, scalability, and ease of use make MySQL a popular choice for developers. In fact, you’ll find it at the heart of demanding, high-traffic applications ...
Method Overriding: Subclasses can override superclass methods. When a method is called on an instance of the subclass, Python first looks for the method in the subclass. If not found, it looks for a method in the superclass. Single Inheritance: Python supports single inheritance, which means ...