PHP is a widely-used, open-source, server-side scripting language that is especially suited for web development. It stands for "Hypertext Preprocessor". PHP code can be embedded into HTML, making it easy to create dynamic and interactive web pages.

abhinandankondekar2 0 views 60 slides May 19, 2025
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About This Presentation

PHP is a widely-used, open-source, server-side scripting language that is especially suited for web development. It stands for "Hypertext Preprocessor". PHP code can be embedded into HTML, making it easy to create dynamic and interactive web pages.

Size: 484.56 KB
Language: en
Added: May 19, 2025
Slides: 60 pages

Slide Content

JavaScript can "display" data in different ways:
Writing into an HTML element,
using innerHTML or innerText.
Writing into the HTML output using document.write().
Writing into an alert box, using window.alert().
Writing into the browser console, using console.log().

<html>
<body>
<h1>My First Web Page</h1>
<p>My first paragraph.</p>
<script>
document.write(5 + 6);
Window.alert(6+7);
console.log(5 + 6);
</script>
</body>
</html>
Try it Yourself »

//Write a JavaScript function that adds two numbers and displays the result USING ALERT
<html>
<body>
<h1>JavaScript Functions</h1>
<script>
function addNumbers(a, b){
var sum = a + b;
alert("The sum is: " + sum);}
addNumbers(5, 10);
</script>
</body>
</html>

Develop a JavaScript program that calculates the area of a rectangle and displays the result
using alert().
<!DOCTYPE html>
<html>
<head>
<title>Rectangle Area Calculator</title>
<script>
function calculateArea() {
// Get length and width from the user
let length = parseFloat(prompt("Enter the length of the rectangle:"));
let width = parseFloat(prompt("Enter the width of the rectangle:"));
// Calculate the area
let area = length * width;
// Display the result
alert("The area of the rectangle is: " + area);
}
</script>
</head>
<body>
<h2>Click the button to calculate the area of a rectangle</h2>
<button onclick="calculateArea()">Calculate Area</button>
</body>
</html>

Develop a JavaScript program that takes the length, width, and height of a cuboid from the user, calculates the
volume, and displays the result using alert().
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Volume of Cuboid</title>
</head>
<body>
<script>
// Get user inputs
let length = parseFloat(prompt("Enter the length of the cuboid:"));
let width = parseFloat(prompt("Enter the width of the cuboid:"));
let height = parseFloat(prompt("Enter the height of the cuboid:"));
// Calculate volume
let volume = length * width * height;
// Display the result
alert("The volume of the cuboid is: " + volume);
</script>
</body>
</html>

PHP

•PHP
is an acronym for "PHP: Hypertext Preprocessor“
•PHP
code is executed on the server, and the result is returned to the
browser
as plain HTML
•PHP
is a widely-used, open source scripting language
•PHP
scripts are executed on the server
•PHP
is free to download and use
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What is PHP?

•PHP
files can contain text, HTML, CSS, JavaScript, and PHP code
•PHP
files have extension ".php"
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What is a PHP File?

•PHP
can generate dynamic page content
•PHP
can create, open, read, write, delete, and close files on the server
•PHP
can collect form data
•PHP
can send and receive cookies
•PHP
can add, delete, modify data in your database
•PHP
can be used to control user-access
•PHP
can encrypt data
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What Can PHP Do?

•A
PHP script starts with <?php and ends with ?>:
<?php
//
PHP code goes here
?>
The
default file extension for PHP files is ".php".
A
PHP file normally contains HTML tags, and some PHP scripting code.
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PHP
 Syntax

Below,
we have an example of a simple PHP file, with a PHP script that
uses
a built-in PHP function "echo" to output the text "Hello World!" on
a
web page:
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PHP
Case Sensitivity
In
PHP, keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-
defined
functions are not case-sensitive.
<!DOCTYPE html>
<html>
<body>
<?php
ECHO "Hello
World!<br>";
echo "Hello
World!<br>";
EcHo "Hello
World!<br>";
?>
</body>
</html>
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OUTPUT

Hello
World!
Hello
World!
Hello
World!

<!DOCTYPE html>
<html>
<body>
<?php
$color
= "red";
echo "My
car is " . $color . "<br>";
echo "My
house is " . $COLOR . "<br>";
echo "My
boat is " . $coLOR . "<br>";
?>
</body>
</html>
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However; all variable names are case-sensitive!
Output
My
car is red
My
house is
My
boat is

In
PHP, a variable starts with the $ sign, followed by the name of the
variable:
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Creating (Declaring) PHP Variables

Rules
for PHP variables:
A
variable starts with the $ sign, followed by the name of the variable
A
variable name must start with a letter or the underscore character
A
variable name cannot start with a number
A
variable name can only contain alpha-numeric characters and
underscores
(A-z, 0-9, and _ )
Variable
names are case-sensitive ($age and $AGE are two different
variables)
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PHP Variables

<!DOCTYPE
html>
<html>
<body>
<?php
$txt
= "sanjivani";
echo
"I love $txt!";
?>
</body>
</html>
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<!DOCTYPE
html>
<html>
<body>
<?php
$x
= 5;
$y
= 4;
echo
$x + $y;
?>
</body>
</html>
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•PHP
supports the following data types:
•String
•Integer
•Float
(floating point numbers - also called double)
•Boolean
•Array
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PHP Data Types

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PHP Strings

<?php
$x
= 5985;
$y
= 10.365;
var_dump($x);
var_dump($y);
?>
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Array

•strlen()
- Return the Length of a String
•str_word_count()
- Count Words in a String
•strrev()
- Reverse a String
•strpos()
- Search For a Text Within a String
•str_replace()
- Replace Text Within a String
<?php
echo strrev("Hello
world!");  // outputs !dlrow olleH
echo str_word_count("Hello
world!");  // outputs 2
echo strrev("Hello
world!");  // outputs !dlrow olleH
echo strpos("Hello
world!", "world");  // outputs 6
echo str_replace("world", "Dolly", "Hello
world!"); // outputs Hello Dolly!
?>
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PHP Strings

•PHP
pi() Function
•PHP
min() and max() Functions
•PHP
abs() Function
•PHP
sqrt() Function
•PHP
round() Function
<?php
echo(pi()); //
returns 3.1415926535898
echo(min(0, 150, 30, 20,
-8, -200));  // returns -200
echo(abs(-6.7));  //
returns 6.7
echo(sqrt(64));  //
returns 8
echo(round(0.60));  //
returns 1
?>
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PHP Math

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PHP Arithmetic Operators

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•Write
a PHP script to check whether a number is even or odd.
<?php
$num = 7;
if
($num % 2 == 0) { echo "Even number";}
else
{echo "Odd number";}
?>

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What is Form

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<html>  
<body>
<form action="welcome.php" method="post">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>
</body>
</html>

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<!DOCTYPE HTML>
<html>  
<body>
<form action="welcome_get.php" method="get">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>
</body>
</html>

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When to use GET?
•Information
sent from a form with the GET method is 
visible to everyone (all
variable
names
and values are displayed in the URL).
• GET
also has limits on the amount of information to send.
•The
limitation is about 2000 characters.
•it
is possible to bookmark the page. 
When to use POST?
•Information
sent from a form with the POST method is 
invisible to others (all

names/values
are embedded within the body of the HTTP request)
•has no limits on
the amount of information to send.
•it
is not possible to bookmark the page.

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