Hello World with PHP Simple Variable Declaration Concatenate First and Last Name Define and Display Constants Basic Arithmetic Operations String Length Function Age Calculation Check Even or Odd Simple Calculator Discount Calculation Data Type Conversion Number Guessing Game Bank Account Balance Update User Role Management with Constants

If-Else Statement Simple If Statement If elseif Problem Switch Case for Day of the Week While Loop to Print Numbers For Loop to Calculate Factorial For Loop with Array Do-While Loop to Display Numbers Sum of Even Numbers Using For Loop Break and Continue in Loops Nested Loop for Multiplication Table Find Largest Number in Array Using While Loop Sum of Odd Numbers Using While Loop Factorial Using Recursion Fibonacci Sequence with a For Loop Check Prime Number using for Loop Nested Loops for Pattern Printing Sum of Digits of a Number Using a While Loop Prime Numbers Between Two Numbers Multiplication Table Using Nested Loops Find Common Elements Between Two Arrays using foreach Diamond Pattern with Stars Sum of Numbers Divisible by 3 or 5 Print Triangle Pattern with Numbers Print a Right-Angle Triangle of Stars

Reverse an Array Sum of Array Elements Find the Maximum and Minimum Remove Duplicate Elements Sort Array Without Using Built-in Functions Check if an Element Exists Count Even and Odd Numbers Convert Array to String Remove Null Values Sum of Even Numbers Merge Two Arrays Rotate an Array Check if Array is Sorted Find Missing Number in Array Find the Second Largest Element Split Array into Chunks Find Intersection of Two Arrays Remove Elements Greater Than X Transpose a 2D Array Find Pairs with a Given Sum Find Subarray with Maximum Sum (Kadane’s Algorithm) Group Anagrams

Create a Class and Object Default Constructor Parameterized Constructor Methods with Parameters Getters and Setters Static Methods Object Interaction Inheritance Polymorphism Encapsulation Abstract Classes Operator Overloading Builder Pattern Singleton Pattern Magic Methods with Serialization Overloading Properties and Methods Factory Pattern Object Cloning Event Management System Real-Time Notifications System Data Encryption and Decryption Observer Pattern