How can the EVA principle (Eingabe-Verarbeitung-Ausgabe) be applied to improve the structure of PHP code for database operations?

To improve the structure of PHP code for database operations using the EVA principle, we can separate the input (Eingabe), processing (Verarbeitung), and output (Ausgabe) into distinct sections. This helps to make the code more organized, readable, and maintainable. 

// Eingabe
$input_data = $_POST['data'];

// Verarbeitung
// Connect to the database
$connection = new mysqli('localhost', 'username', 'password', 'database');

// Check connection
if ($connection->connect_error) {
    die("Connection failed: " . $connection->connect_error);
}

// Process the input data
$query = "INSERT INTO table_name (column_name) VALUES ('$input_data')";
$result = $connection->query($query);

// Ausgabe
if ($result) {
    echo "Data inserted successfully";
} else {
    echo "Error: " . $connection->error;
}

// Close connection
$connection->close();

Keywords

EVA principle PHP code database operations structure PHP functions

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