What is the significance of the :: notation in PHP when working with classes and MySQLi?

The :: notation in PHP is used to access static methods and properties of a class without needing to instantiate an object of that class. When working with MySQLi, this notation is commonly used to access static methods like mysqli::connect() to establish a database connection. 

// Example of using the :: notation with MySQLi to establish a database connection
$mysqli = new mysqli('localhost', 'username', 'password', 'database_name');

if ($mysqli->connect_error) {
    die('Connection failed: ' . $mysqli->connect_error);
}

// Perform database operations using $mysqli object

Keywords

PHP :: notation classes MySQLi significance

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