In this tutorial i’m going to explore about what is PHP and their datatypes and how to use of variables.
PHP is a open-source side programming language that is specially suited for web development and can be embeded to HTML. It is powerful to hold a content management system like WordPress and can be used to control user access. PHP can actually do anything related to server-side scripting or more popularly known as the backend of a website, it is more secure and reliable to be used as a server-side scripting language.
What is DataTypes?
Datatypes is a range of all different data can be given variable in PHP. It’s supports these string.
- String
- Integer
- Float (floating point numbers – also called double)
- Boolean
- Array
- Object
- NULL
- Resource
How to write datatypes in PHP?
- string:- A string is a data type used in programming, string is a sequence of character its supports a 256-character. The simplest way to create a string is to enclose the string literal (i.e. string characters) in single quotation marks (‘), like this:
$my_string = ‘Hello World’;
2. Integer:- An integer is a number without any decimal part.
<?php $x=123; echo $x; ?>
3. Float:- A float is a number with a decimal point as like- 2.0, 256.4, 10.358, 7.64E+5, 5.56E-5 are all floats.
4. Boolean:- A boolean data can be either TRUE or FALSE. These are predefined constants in PHP.
var_dump((bool) -2); // bool(true)
var_dump((bool) "foo"); // bool(true)
var_dump((bool) 2.3e5); // bool(true)
var_dump((bool) array(12)); // bool(true)
var_dump((bool) array()); // bool(false)
var_dump((bool) "false"); // bool(true)
5. array:- An array stores multiple values in one single variable.
<?php
$cars = array(“Volvo”,”BMW”,”Toyota”);
var_dump($cars);
?>
6. Object:- Objects are the instances of user-defined classes that can store both values and functions. They must be explicitly declared.
7. Null:- Null is a special data type which can have only one value Null, if variable is created without a value it is automatically assigned a value of Null.
8. Resource:- Resources are not the exact data type in PHP. Resource is the storing the refrenece to functions call or refrences to external PHP resource as like database.