Database Connectivity Methods in PHP Explained
Database Connectivity
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<?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";
?>
OUTPUT:
Connected successfully
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<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = mysqli_connect($servername, $username, $password);
// Check connection
if (!$conn)
{ die("Connection failed: " . mysqli_connect_error());}
echo "Connected successfully";
?>
OUTPUT:
Connected successfully
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PDO - PHP Data Objects - is a database access layer
providing a uniform method of access to multiple
databases. It doesn't account for database-specific
syntax, but can allow for the process of switching
databases and platforms to be fairly painless, simply
by switching the connection string in many instances.
<?php
$servername = "localhost";
$username = "username";
$password = "password";
try {$conn
= new PDO("mysql:host=$servername;dbname=myDB",$username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE,
PDO::ERRMODE_EXCEPTION);
echo "Connected successfully";
}
catch(PDOException $e)
{echo "Connection failed: " . $e->getMessage();
}
?>
OUTPUT:
Connected successfully
This article explores different methods for establishing database connectivity in PHP, including MySQLi (Object-Oriented and Procedural), PDO (PHP Data Objects) explaining their implementation, error handling, and advantages. Learn how to connect to databases seamlessly and efficiently in PHP.
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Presentation Transcript
MySQLi MySQLiObject Object- -Oriented Oriented <?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"; ?> OUTPUT: Connected successfully
MYSQLI MYSQLIPROCEDURAL PROCEDURAL <?php $servername = "localhost"; $username = "username"; $password = "password"; // Create connection $conn = mysqli_connect($servername, $username, $password); // Check connection if (!$conn) { die("Connection failed: " . mysqli_connect_error()); } echo "Connected successfully"; ?> OUTPUT: Connected successfully
PDO PDO // set the PDO error mode to exception $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); echo "Connected successfully"; } catch(PDOException $e) { echo "Connection failed: " . $e->getMessage(); } ?> PDO - PHP Data Objects - is a database access layer providing a uniform method of access to multiple databases. It doesn't account for database-specific syntax, but can allow for the process of switching databases and platforms to be fairly painless, simply by switching the connection string in many instances. <?php $servername = "localhost"; $username = "username"; $password = "password"; try { OUTPUT: $conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password); Connected successfully
