What is the use of this keyword in PHP?
$this is a reserved keyword in PHP that refers to the calling object. It is usually the object to which the method belongs, but possibly another object if the method is called statically from the context of a secondary object. This keyword is only applicable to internal methods.
What does :: mean in PHP?
The Scope Resolution Operator (also called Paamayim Nekudotayim) or in simpler terms, the double colon, is a token that allows access to static, constant, and overridden properties or methods of a class. … It’s possible to reference the class using a variable.
What is alias in PHP?
The ability to refer to an external fully qualified name with an alias, or importing, is an important feature of namespaces. This is similar to the ability of unix-based filesystems to create symbolic links to a file or to a directory. PHP can alias(/import) constants, functions, classes, interfaces, and namespaces.
What is the use of use in laravel?
The use keyword allows the developers to shorten the namespace. The namespace once created can include various functionalities which can be used in controllers and various classes.
Why namespace is used in PHP?
In the PHP world, namespaces are designed to solve two problems that authors of libraries and applications encounter when creating re-usable code elements such as classes or functions: Name collisions between code you create, and internal PHP classes/functions/constants or third-party classes/functions/constants.
What is difference between self and this?
The self and this are two different operators which are used to represent current class and current object respectively. self is used to access static or class variables or methods and this is used to access non-static or object variables or methods.
Why do we use PHP?
PHP (Hypertext Preprocessor) is known as a general-purpose scripting language that can be used to develop dynamic and interactive websites. It was among the first server-side languages that could be embedded into HTML, making it easier to add functionality to web pages without needing to call external files for data.
What is PHP and its syntax?
The structure which defines PHP computer language is called PHP syntax. The PHP script is executed on the server and the HTML result is sent to the browser. It can normally have HTML and PHP tags. … PHP scripts can be written anywhere in the document within PHP tags along with normal HTML.
What is -> called in PHP?
In C++ the “->” operator is called “member of pointer” but the PHP “->” operator is actually closer to the “.” operator in C++ and that is called “member of object“.
What is a PHP trait?
Traits ¶ … Traits are a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies.
What is your alias?
a false name used to conceal one’s identity; an assumed name: The police files indicate that “Smith” is an alias for Simpson. adverb. at another time; in another place; in other circumstances; otherwise.
What is the namespace in PHP?
A namespace is a hierarchically labeled code block holding a regular PHP code. A namespace can contain valid PHP code. Namespace affects following types of code: classes (including abstracts and traits), interfaces, functions, and constants. Namespaces are declared using the namespace keyword.