Working with PHP and 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
- MySQL is a database system that runs on a server
- MySQL uses standard SQL
- MySQL compiles on a number of platforms
- MySQL is free to download and use
The data in a MySQL database are stored in tables. A table is a collection of related data, and it consists of columns and rows.
if you already Installed WAMP Server MySQL is already Installed and view through PhpMyadmin is a free, open source platform used to administer MySQL with a web browser;
test PHPMyadmin click this link http://localhost/phpmyadmin/
Creating Database
- Create database in PHPMyadmin interface
- 2.Create database in PHPMyadmin SQL Query
you can create databse with SQL Query
CREATE DATABASE `user` ;
3.Create Databse in PHP Script
before you create you need to connect to MySQL with user name and password
Connecting to Database and Creating Database
<?php
$servername = "localhost";
$username = "username"; // user name
$password = "password"; // your password
// Create connection$conn = mysqli_connect($servername, $username, $password);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
// Create database$sql = "CREATE DATABASE myEmployee";
if (mysqli_query($conn, $sql)) {
echo "Database created successfully";
} else {
echo "Error creating database: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
$servername = "localhost";
$username = "username"; // user name
$password = "password"; // your password
// Create connection$conn = mysqli_connect($servername, $username, $password);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
// Create database$sql = "CREATE DATABASE myEmployee";
if (mysqli_query($conn, $sql)) {
echo "Database created successfully";
} else {
echo "Error creating database: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
Creating table in side myEmployee database
we need to select the carrasponding databse and create table use the following code
this code create employee Table with 4 field (first name,second name,email, date )
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myEmployee";
// Create connection$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
// sql to create table$sql = "CREATE TABLE employee (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";
if (mysqli_query($conn, $sql)) {
echo "Table MyGuests created successfully";
} else {
echo "Error creating table: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myEmployee";
// Create connection$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
// sql to create table$sql = "CREATE TABLE employee (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";
if (mysqli_query($conn, $sql)) {
echo "Table MyGuests created successfully";
} else {
echo "Error creating table: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
Table Employee created
Insert In to table
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myEmployee";
// Create connection$conn = new mysqli($servername, $username, $password, $dbname);
// Check connectionif ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";
if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>
fetch Data fro data base and out put in PHP page
fetch the data from employee table and out put in PHP page
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myEmployee";
// Create connection$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "SELECT id, firstname, lastname FROM employee";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 results";
}
mysqli_close($conn);
?>
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myEmployee";
// Create connection$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connectionif (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "SELECT id, firstname, lastname FROM employee";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 results";
}
mysqli_close($conn);
?>
Result
Other Operations
DELETE
// sql to delete a record$sql = "DELETE FROM MyGuests WHERE id=3";
if ($conn->query($sql) === TRUE) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . $conn->error;
}
UPDATE
$sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2";
if ($conn->query($sql) === TRUE) {
echo "Record updated successfully";
} else {
echo "Error updating record: " . $conn->error;
}
LIMIT
$sql = "SELECT * FROM Orders LIMIT 30";
