Description: The 'getByID' function in PHP is used to retrieve the user data from a database based on their unique ID. It takes the user ID as a parameter and returns the user details in an associative array or an object.
Code Example: Here's an example of how to use the 'getByID' function to retrieve a user's details from a MySQL database using the PDO extension:
// connect to the database $pdo = new PDO('mysql:host=hostname;dbname=database', 'username', 'password');
// create the SQL statement with a parameter for the user ID $sql = "SELECT * FROM users WHERE id = :id";
// prepare the statement $stmt = $pdo->prepare($sql);
// bind the user ID to the parameter $stmt->bindValue(':id', $userID, PDO::PARAM_INT);
// execute the query $stmt->execute();
// fetch the user details as an associative array $user = $stmt->fetch(PDO::FETCH_ASSOC);
Example Briefly Described: In the above example, we are connecting to a MySQL database and preparing an SQL statement to fetch user details using the 'getByID' function. We pass the user ID as a parameter to the prepared statement and bind the value to it. Then we execute the query and fetch the user details as an associative array. Finally, we output the user details on the webpage.
Package/Library: The package/library used in the example is the PDO extension which is a database abstraction layer providing a uniform interface to access various databases like MySQL, Oracle, SQLServer, PostgreSQL, etc.
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