PHP is a server-side scripting language that uses variables to store data. Variables are like containers where you keep information you need to use later. In PHP, variables always start with a $ symbol. For example:

$name = "John";
$age = 25;

Main Types of Variables in PHP

1. String Variables

A string variable stores text, like names, words, or sentences.

$city = "London";

Here, $city holds the text London.

2. Integer Variables

An integer variable stores whole numbers (positive, negative, or zero).

$score = 100;

This means $score holds a numeric value without any decimal point.

3. Float (or Double) Variables

Float variables hold numbers with decimals.

$price = 99.99;

Here, $price contains a decimal value.

4. Boolean Variables

Boolean variables have only two possible values: true or false. These are useful for conditions.

$is_active = true;

This means $is_active is set to true.

5. Array Variables

An array stores multiple values in a single variable.

$fruits = array("Apple", "Banana", "Orange");

Here, $fruits holds three items in one variable.

6. Object Variables

Objects are variables that store data and functions together, created using classes.

class Car {
  public $brand = "Toyota";
}
$myCar = new Car();

Here, $myCar is an object of the Car class.

7. NULL Variables

A NULL variable has no value assigned to it.

$address = NULL;

This means $address currently has no data.

Final Thoughts

When I understood these variable types, PHP became much easier to learn. Once you know what kind of data you are working with, coding in PHP feels more organized and fun.