Php with mysql ppt

PRESENTATION ON
PHP WITH MYSQL DATABASE
Prepared By
Ms. R. Gomathijayam
Assistant Professor
Bon Secours College for Women
Thanjavur

PHP INTRODUCTION
What is PHP?
• PHP is a server side programming language, and a
powerful tool for making dynamic and interactive Web
pages.
• PHP is an acronym for "PHP: Hypertext Preprocessor“
• Original Name: Personal Home Page
• PHP is created by Rasmus Lerdorf in 1994.
• PHP is a widely-used, open source scripting language
• PHP scripts are executed on the server
•PHP 7 is the latest stable release.

What Can PHP Do?
• 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

PHP Supported Web Server
• Microsoft Internet Information Server
• Apache Server
• Xitami
• Sambar Server
PHP Supported Editors
• Macintosh’s BBEdit
• Simple Text
• Windows Notepad or Wordpad
• Macromedia Dream Weaver

What is a PHP File?
• PHP files can contain text, HTML, CSS, JavaScript, and
PHP code. It is executed on the server, and the result is
returned to the browser as plain HTML.
• PHP files have extension ".php“
• Download it from the official PHP resource: www.php.net
• PHP runs on various platforms (Windows, Linux, Unix,
Mac OS X, etc.)

Basic PHP Syntax
• A PHP script starts with <?php and ends with ?>:
<?php
// PHP code goes here
?>
Example
<!DOCTYPE html>
<html>
<body>
<?php
echo "My first PHP script!";
?>

PHP Case Sensitivity
• In PHP, No keywords (e.g. if, else, while, echo, etc.),
classes, functions, and user-defined functions are case-
sensitive.
<!DOCTYPE html>
<html>
<body>
<?php
ECHO "Hello World!<br>";
echo "Hello World!<br>";
EcHo "Hello World!<br>";
?>
</body>
</html>

PHP Form Handling
• The PHP super globals $_GET and $_POST are used to
collect form-data.
Example
<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>

Getting form data into PHP pages
• To display the submitted data you could simply echo all
the variables. The "welcome.php“
<html>
<body>
Welcome
<?php echo $_POST["name"]; ?>
<br>
Your email address is:
<?php
echo $_POST["email"];
?>
</body>
</html>

Using the HTTP GET method
<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” value=“send”>
</form>
</body>
</html>

PHP COOKIES
What is a Cookie?
• A cookie is a small file that the server embeds on the
user's computer. Each time the same computer requests a
page with a browser, it will send the cookie too.
• With PHP, we can both create and retrieve cookie values.
Syntax
setcookie(name, value, expire, path, domain, secure);
• Only the name parameter is required. All other parameters
are optional.

Example
<?php
$cookie_name = "user";
$cookie_value = "John Doe";
setcookie($cookie_name, $cookie_value, time() +
(86400 * 30), "/"); // 86400 = 1 day
if(!isset($_COOKIE[$cookie_name])) {
echo "Cookie named '" . $cookie_name . "' is not
set!";
} else {
echo "Cookie '" . $cookie_name . "' is set!<br>";
echo "Value is: " . $_COOKIE[$cookie_name];
}
?>

PHP Sessions
• A session is a way to store information (in variables) to be
used across multiple pages.
• Session variables hold information about one single user,
and are available to all pages in one application.
Start a PHP Session
•A session is started with the session_start() function.
• Session variables are set with the PHP global variable:
$_SESSION.

Example
<?php
// Start the session
session_start();
?>
<?php
// Set session variables
$_SESSION["favcolor"] = "green";
$_SESSION["favanimal"] = "cat";
echo "Session variables are set.";
?>

PHP - What is OOP?
• From PHP5, we can also write PHP code in an object-
oriented style. bject-Oriented programming is faster and
easier to execute.
• A class is a template for objects, and an object is an
instance of class.
Example
<?php
class Fruit {
// Properties
public $name;
public $color;

// Methods
function set_name($name) {
$this->name = $name;
}
function get_name() {
return $this->name;
}}
$apple = new Fruit();
$banana = new Fruit();
$apple->set_name('Apple');
$banana->set_name('Banana');
echo $apple->get_name();
echo "<br>";
echo $banana->get_name();
?>

PHP with MySQL
• With PHP, you can connect to and manipulate databases.
MySQL is the most popular database system used with
PHP.
What is MySQL?
• MySQL is a database system used on the web and
runs on a server.
• MySQL uses standard SQL.
• MySQL compiles on a number of platforms.
• MySQL is developed, distributed, and supported by
Oracle Corporation.

Connect to PHP with MySQL
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = new mysqli($servername, $username,
$password);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>

Create a MySQL Database
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE)
{
echo "Database created successfully";
}
else {
echo "Error creating database: " . $conn->error;
}
$conn->close();

Table Creation
$sql = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY
KEY, firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP DEFAULT
CURRENT_TIMESTAMP ON UPDATE
CURRENT_TIMESTAMP
)";
if ($conn->query($sql) === TRUE) {
echo "Table MyGuests created successfully";
} else {
echo "Error creating table: " . $conn->error;
}

Insert Database
$sql = "INSERT INTO MyGuests (firstname, lastname,
email)
VALUES ('John', 'Doe', 'john@example.com')";
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}

Data Retrieval
$sql = "SELECT id, firstname, lastname FROM
MyGuests";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - Name: " .
$row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 results";
}

Deletion
$sql = "DELETE FROM MyGuests WHERE id=3";
echo "Record deleted successfully";
}
else {
echo "Error deleting record: " . $conn->error;
}

Data Updation
$sql = "UPDATE MyGuests SET lastname='Doe'
WHERE id=2";
echo "Record updated successfully";
}
else {
echo "Error updating record: " . $conn->error;
}

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