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Fundamentals of PHP 1 What is PHP 2 Benefits of PHP 3 Applications of PHP 4 History and Evolution 5 About PHP Tutorial

Overview of PHP 1 Features of PHP 2 How to Install PHP Server 3 Basic Syntax 4 Echo in PHP 5 Simple Example of PHP 6 Print in PHP 7 Comments in PHP

Data Types 1 PHP String 2 PHP Integer 3 PHP Float 4 PHP Boolean 5 PHP Array 6 PHP Object 7 PHP NULL Value 8 Datatype Introduction PHP

PHP Operators 1 PHP Operators Introduction 2 Arithmetic operators 3 Assignment operators 4 Comparison operators 5 Increment/Decrement operators 6 Logical operators in PHP 7 String operators 8 Array operators 9 Conditional assignment operators 10 Scope Resolution Operator

Variables and Constants 1 Variable Introduction in PHP 2 Local Variables 3 Function parameters 4 Global variables 5 Static variables in PHP

Decision Making in PHP 1 Decision Making Introduction 2 if Statement 3 if...else Statement 4 elseif statement 5 switch statement

Looping in PHP 1 Loops Introduction in PHP Language 2 While Loop in PHP Language 3 Do While Loop in PHP Language 4 For Loop in PHP Language 5 Breaking out of a loop in PHP Language 6 Continuing a Loop in PHP Languauge

Class, Object and Methods in PHP 1 Exception Handling in PHP 2 Class and Object Introduction 3 Properties in Class 4 Methods in Class PHP 5 public, private, protected properties in PHP 6 public, private, protected methods in PHP

Learn How To 1 How to Compress Image Size Without Losing Quality in PHP

PHP MCQ 1 Object Oriented Concept of PHP 2 PHP Basic MCQ 3 Variables in Php MCQ 4 Arrays in PHP MCQ 5 PHP String and Regular Expression 6 Functions in PHP MCQ 7 HTML Form and PHP MCQ 8 Exception Handling in PHP 9 MySql with PHP Basic MCQ

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Understanding NULL in PHP: Handling Absence of Value

Rumman Ansari July 09, 2024 5,817 views

Understanding NULL in PHP: Handling Absence of Value

Null is a special data type which can have only one value: NULL.

A variable of data type NULL is a variable that has no value assigned to it.

Tip: If a variable is created without a value, it is automatically assigned a value of NULL.

Variables can also be emptied by setting the value to NULL:

Syntax:



<?php
$x = "Hello world!";
$x = null;
var_dump($x);
?>