Database connection in PHP

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Ways of Connecting to MySQL through PHP

Today we will see how to program databases connection in PHP. In order to store or access the data inside a MySQL database, you first need to connect to the MySQL database server and a PHP script.

When developers usually say database, they are referring to MySQL. MySQL’s ability to handle huge volumes of data without breaking .

There are three types of methods in PHP to connect MySQL database:


Below PHP script connect to Mysql Database –

$con = mysqli_connect('hostname', 'uesrname', 'password', 'database name'); 
if (!$con) { echo "Error: " . mysqli_connect_error(); exit(); }

It provides a better set of functions and extensions. It works just like the previous version, but it is safer and faster.
Create a new PHP file(db_connection.php) to check your database connection

function OpenCon() {
 $dbhost = "localhost"; $dbuser = "root"; 
 $dbpass = "1234"; $db = "example";
 $conn = new mysqli($dbhost, $dbuser, $dbpass,$db) or die("Connect failed: %s\n". $conn -> error);</p> <p> return $conn;<br ?--> }

function CloseCon($conn)
$conn -> close();

Create a new PHP file to connect to your database. Name it index.php and add this code in this file.

include 'db_connection.php';
$conn = OpenCon();
echo "Connected Successfully"; CloseCon($conn);

PHP Data Objects (PDO) extension is a Database Abstraction Layer. It is like an interface for the backend to interact with the MySQL database .

 $dsn = "mysql:host=localhost;dbname=mydb"; 
 $user = "user12"; $passwd = "12user";
 $pdo = new PDO($dsn, $user, $passwd); 
 $stm = $pdo->query("SELECT * FROM test");
 $rows = $stm->fetchAll(PDO::FETCH_NUM);
 foreach($rows as $row) {

In this post, we saw how to connect database in PHP with 3 different types of databases. Hope you like it.
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