Assignments:PHP basic and datatypes

 Class 2: PHP Basics - Syntax and Data Types

Assignment 1: Display a Simple Message

Code:

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

 Explanation: This script demonstrates the use of echo to output a simple message.

Assignment 2: Use print to Display a Message

Code:

<?php print "Welcome to PHP Basics!"; ?>

 Explanation: This script demonstrates the use of print to output a message, similar to echo.

Assignment 3: Declare and Display Variables

Code:

<?php $greeting = "Hello"; $year = 2024;  echo $greeting . " World! Year: " . $year; ?>

 Explanation: This script shows how to declare variables and concatenate them with a string using ..

Assignment 4: Basic Data Types - Strings

Code:

Explanation: This script demonstrates how to work with string data types.

<?php $name = "Alice"; $occupation = "Engineer";   echo "Name: $name\n"; echo "Occupation: $occupation\n"; ?>

 

Assignment 5: Basic Data Types - Integers

Code:

Explanation: This script shows how to work with integer data types.

<?php $age = 30; $yearOfBirth = 1994;  echo "Age: $age\n"; echo "Year of Birth: $yearOfBirth\n"; ?>

 

Assignment 6: Basic Data Types - Floats

Code:

Explanation: This script demonstrates the use of floating-point numbers.

<?php $price = 19.99; $discount = 0.15; echo "Price: $$price\n"; echo "Discount: $discount\n"; ?>

 

Assignment 7: Basic Data Types - Booleans

Code:

Explanation: This script shows how to use boolean values and conditional statements to display them.

<?php $isAvailable = true; $isSoldOut = false; echo "Available: " . ($isAvailable ? "Yes" : "No") . "\n"; echo "Sold Out: " . ($isSoldOut ? "Yes" : "No") . "\n"; ?>

 

Assignment 8: Type Casting - String to Integer

Code:

<?php $stringNumber = "123"; $integerNumber = (int)$stringNumber; echo "String: $stringNumber\n"; echo "Integer: $integerNumber\n"; ?>

 Explanation: This script demonstrates type casting from a string to an integer.

Assignment 9: Type Casting - Integer to Float

Code:

<?php $integerNumber = 45; $floatNumber = (float)$integerNumber;  echo "Integer: $integerNumber\n"; echo "Float: $floatNumber\n"; ?>

 Explanation: This script shows type casting from an integer to a float.

Assignment 10: Type Casting - Float to String

Code:

<?php $floatNumber = 9.99; $stringNumber = (string)$floatNumber;  echo "Float: $floatNumber\n"; echo "String: $stringNumber\n"; ?>

 Explanation: This script demonstrates type casting from a float to a string.

Assignment 11: Concatenate Strings and Variables

Code:

<?php $firstName = "John"; $lastName = "Doe";   echo "Full Name: " . $firstName . " " . $lastName; ?>

 Explanation: This script demonstrates concatenating strings with variables.

Assignment 12: Arithmetic Operations with Variables

Code:

<?php $x = 10; $y = 5; $sum = $x + $y; $product = $x * $y; echo "Sum: $sum\n"; echo "Product: $product\n"; ?>

 Explanation: This script performs basic arithmetic operations using variables.

Assignment 13: Use of Constants

Code:

<?php define("PI", 3.14159); echo "Value of PI: " . PI; ?>

 Explanation: This script demonstrates how to define and use a constant.

Assignment 14: Check Variable Types

Code:

<?php $variable = 10; echo "Type of variable: " . gettype($variable) . "\n"; $variable = "Hello"; echo "Type of variable: " . gettype($variable) . "\n"; ?>

 Explanation: This script checks and displays the type of a variable using gettype().

Assignment 15: Arithmetic Operations with Floats

Code:

<?php $price = 19.99; $tax = 0.07;  $total = $price + ($price * $tax);  echo "Total Price: $" . number_format($total, 2); ?>

 Explanation: This script performs arithmetic operations with floats and formats the result.

Assignment 16: Variable Scope

Code:

<?php function testScope() {     $localVar = "I'm local";     echo $localVar . "\n"; }  testScope(); // echo $localVar; // This will cause an error ?>

 Explanation: This script demonstrates variable scope by showing that variables inside a function are local to that function.

Assignment 17: Using isset() to Check Variable Initialization

Code:

<?php $var; if (isset($var)) {     echo "Variable is set."; } else {     echo "Variable is not set."; } ?>

 Explanation: This script checks whether a variable is set using isset().

Assignment 18: Type Casting - Boolean to Integer

Code:

<?php $booleanValue = true; $integerValue = (int)$booleanValue; echo "Boolean: $booleanValue\n"; echo "Integer: $integerValue\n"; ?>

 Explanation: This script demonstrates type casting from a boolean to an integer.

Assignment 19: Concatenate String and Integer

Code:

<?php $age = 25; $message = "Age: " . $age;  echo $message; ?>

 Explanation: This script concatenates a string with an integer and displays the result.

Assignment 20: Using var_dump() to Display Variable Types and Values

Code:

<?php $integer = 42; $float = 3.14; $string = "Hello";  var_dump($integer); var_dump($float); var_dump($string); ?>

 Explanation: This script uses var_dump() to display the type and value of different variables.

These assignments cover a variety of fundamental topics related to PHP syntax and data types, providing students with hands-on practice in declaring variables, type casting, and using PHP’s basic features.