Menu
Coddy logo textTech
START LEARNING
flag En iconEnglishdown icon

The PHP Language

Part of the Fundamentals section of Coddy's PHP journey — lesson 1 of 71.

PHP is a popular server-side scripting language that powers millions of websites around the world, including major platforms like Facebook and WordPress.

PHP stands for "PHP: Hypertext Preprocessor" and is designed specifically for web development. Unlike languages that run in your browser, PHP code executes on the server before sending results to users.

challenge icon

Challenge

Easy

Press the run code button to run your first code in PHP

Try it yourself

<?php
echo "Hello World!";
?>

All lessons in Fundamentals

1Introduction to PHP

The PHP LanguageHello World!Tags and StatementsCommentsThe new line

4Comparison & Logical Operators

Comparison OperatorsEquality & IdentityLogical Operators Part 1Logical Operators Part 2Recap - Simple Logic

7Arrays Part 2 - Associative

Intro to Associative ArraysAccessing Values by KeyModifying Values by KeyAdding New Key-Value PairsCheck if Key ExistsRecap - Key-Value Data Store

10Functions

Declaring & Calling FunctionsFunction ParametersReturning ValuesDefault Parameter ValuesType Declarations for ParamsReturn Type DeclarationsVariable ScopeRecap - Creating Reusable Code

2Variables and Data Types

NumbersStrings and QuotesBooleansNaming ConventionsRecap - Variable InitEmpty VariablesString ConcatenationGetting User InputCast to Different Types

5Conditional Logic

If StatementIf - ElseThe Ternary OperatorNull Coalescing OperatorSwitch StatementRecap - Making Decisions

8Loops

For LoopWhile LoopForeach LoopLooping with Keys and ValuesBreak StatementContinue StatementRecap - Iterating Over Data

11Final Challenges

Challenge - Factorial CalcChallenge - Longest WordChallenge - Vowel Counter

3Basic Operators

Arithmetic OperatorsModulo OperatorExponentiation OperatorCombined AssignmentIncrement/DecrementOperator PrecedenceRecap - Simple CalculationsString Operators

6Arrays Part 1 - Indexed

Introduction to ArraysCreating Indexed ArraysAccessing Elements by IndexModifying Elements by IndexArray Size with CountAdding Elements to an ArrayRecap - Managing a Simple List

9Project: Simple To-Do List

Project Overview & DataAdding a New TaskProject lessonDisplaying All TasksProject lessonMarking a Task as CompleteProject lessonRemoving a TaskProject lessonFiltering by Completion StatusProject lessonHandling Empty List ScenariosProject lesson