Variables are used to store data and each variable can store one type of data. PHP Data type is one thing that beginner programmers don’t deal with but need to become a professional.
In defining the variables, we said that when defining the variable, PHP defines the data type of the variable automatically and we don’t need to define it. In the following, we will discuss the types of data types in PHP.
PHP supports the following data types:
- String
- Integer
- Float (یا double)
- Boolean
- Array
- Object
- NULL
- Resource
String data type in PHP
The string data type is used to store strings and text.
$str = 'Honar Systems';
echo $str;
----------------
Honar SystemsLearn more about PHP string.
Integer PHP data type
This data type is an integer between -2,147,483,648 and 2,147,483,647.
- An integer must have at least one digit
- An integer must not contain a decimal
- An integer can be positive or negative
- Integers can be specified as decimal (base 10), hexadecimal (base 16), octal (base 8), or binary (base 2).
$var = 1989;
echo $var;
------------
1989Float
This data type is a simple decimal or exponential number.
$var=1989.56;
var_dump($var);
--------------
float 1989.56Boolean
This data type is set to true or false.
$var1 = true;
$var2 = false;Array
If you have more than one value, you can store it in an array variable. An array is a variable that stores multiple values.
$cars = array("Ferrari","Benz","BMW","Volvo",100,true);Learn more about arrays in PHP.
Object
This type of data is used to store an object of the class.
class Car {
public $color;
public $name;
public function __construct($color, $name) {
$this->color = $color;
$this->name = $name;
}
public function message() {
return "My car is a " . $this->color . " " . $this->name . "!";
}
}
$myCar = new Car("black", "Ferrari");
echo $myCar -> message();
echo "<br>";
$myCar = new Car("red", "Benz");
echo $myCar -> message();
-----------------------
My car is a black Ferrari!
My car is a red Benz!NULL
NULL data type is a data type that stores only NULL value. In fact, this data type declares that the variable has no data to store.
If a variable is defined but its value is not specified, its value will automatically be NULL.
$var;
var_dump($var);
---------------
nullResource
This data type is not actually a real data type and you are referring to a resource such as a database variable. We will refer to this type of data more in other articles.
