MySQL with PHP

Open Source Technology
Dr.S Jeyalaksshmi
Associate Professor
Dept. BCA & IT
VISTAS

Introduction to MySQL with PHP
• A database is your best choice for storing data in your web
application, and the MySQL database server has always been
the most popular choice among PHP developers.
• MySQL uses the SQL (Structured Query Language)
programming language to work with the data, and PHP
interacts with MySQL by simply passing SQL code through a set
of MySQL functions to the MySQL server, which then returns a
result that PHP can interpret.
3

Creating table in SQL
• CREATE TABLE employee
( eid int NOT NULL AUTO_INCREMENT,
name varchar(45) NOT NULL,
occupation varchar(35) NOT NULL,
age int NOT NULL, PRIMARY KEY (id) );
4

How to Create a Database?
• A database is defined as an organized collection of data
that makes the data easy to access, manage and modify.
Generally, databases use SQL (Structured Query Language)
for data manipulation.
5

To create a database:
1. Open XAMPP Control Panel and start the Apache server
and MySQL service.
6

STEP 2:
In your browser , type localhost in the address bar, and then on
the XAMPP dashboard, click on the Phpmyadmin tab.
http://localhost/phpmyadmin/ or http://127.0.0.1/phpmyadmin/
7

STEP 3:
Into the phpmyadmin section, click on new to create a new
database. And name your database “db1”.
8

STEP 4:
Now, create a table named “db1” and create columns as
shown below, which you will use on the registration page.
9

1. <?php
2. $con=mysqli_connect('localhost','root','','db1'); database name
3. $check_data=mysqli_query($con,"select * from details");
4. $check=mysqli_num_rows($check_data);
5. if($check_data){ table name
6. while($row_data=mysqli_fetch_array($check_data)){
7. echo("ID:".$row_data['ID']."<br>");
8. echo("NAME:".$row_data['SNAME']."<br>");
9. echo("AGE:".$row_data['AGE']."<br>");
10. } server name
11. } username
12. else{
13. echo ("No data found");
14. }
15. ?>
13

How to Edit and Delete Data From the Database?
15

<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = new mysqli($servername, $username, $pass
word);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>
16

if(! $conn )
{
die('Could not connect: ' . mysqli_error());
}
echo 'Connected successfully';
mysqli_close($conn);
17

if (!$conn)
{
die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully";
18

if ($conn->connect_error)
{
die("Connection failed: " . $conn->connect_error);
}
echo “Connected successfully”;
mysqli_close($conn);
19

Structured Query Language (SQL) is made up of two sub-
languages:
• SQL Data Manipulation Language (DML)
SELECT statements perform queries INSERT, UPDATE,
DELETE statements modify the instance of a table
• SQL Data Definition Language (DDL)
CREATE, DROP statements modify the database schema
GRANT, REVOKE statements enforce the security model
20

Find the last names and hire dates of
employees who make more than $100000.
select LastName, HireDate
from Employee
where Salary > 100000
21

MySQL with PHP

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