- How does a magic function look like in PHP?
- What are PHP traits?
- What are interfaces in PHP?
- What is the correct way to end PHP statement?
- Can a trait have a constructor PHP?
- What is __ invoke in PHP?
- What’s the difference between __ sleep and __ wakeup?
- What are the different types of arrays in PHP?
- How arrays are used in PHP?
- What is a PHP array?
- What is PHP treat?
- What is namespace and use in PHP?
How does a magic function look like in PHP?
In PHP, we can define some special functions that will be called automatically.
Such functions require no function call to execute the code inside these functions.
With this special feature, they can be referred as magic functions or magic methods.
PHP magic methods should be started with (__) symbol..
What are PHP 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 are interfaces in PHP?
PHP – What are Interfaces? Interfaces allow you to specify what methods a class should implement. Interfaces make it easy to use a variety of different classes in the same way. When one or more classes use the same interface, it is referred to as “polymorphism”.
What is the correct way to end PHP statement?
As in C or Perl, PHP requires instructions to be terminated with a semicolon at the end of each statement. The closing tag of a block of PHP code automatically implies a semicolon; you do not need to have a semicolon terminating the last line of a PHP block.
Can a trait have a constructor PHP?
Unlike traits in Scala, traits in PHP can have a constructor but it must be declared public (an error will be thrown if is private or protected). Anyway, be cautious when using constructors in traits, though, because it may lead to unintended collisions in the composing classes.
What is __ invoke in PHP?
The __invoke method is a way that PHP can accommodate pseudo-first-class functions. The __invoke method can be used to pass a class that can act as a closure or a continuation, or simply as a function that you can pass around.
What’s the difference between __ sleep and __ wakeup?
__sleep and __wakeup are methods that are related to the serialization process. … __sleep is supposed to return an array of the names of all variables of an object that should be serialized. __wakeup in turn will be executed by unserialize if it is present in class.
What are the different types of arrays in PHP?
In PHP, there are three types of arrays:Indexed arrays – Arrays with a numeric index.Associative arrays – Arrays with named keys.Multidimensional arrays – Arrays containing one or more arrays.
How arrays are used in PHP?
Arrays are used to contain more than one value in one variable. Arrays allow you to avoid multiple unnecessary variables. PHP Arrays index always start at 0. There are 3 types of PHP arrays: indexed (numeric), associative (key names instead of index numbers) and multidimensional (contain other arrays).
What is a PHP array?
Arrays in PHP is a type of data structure that allows us to store multiple elements of similar data type under a single variable thereby saving us the effort of creating a different variable for every data. … Indexed or Numeric Arrays: An array with a numeric index where values are stored linearly.
What is PHP treat?
PHP treats objects in the same way as references or handles, meaning that each variable contains an object reference rather than a copy of the entire object.
What is namespace and use 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.