How can PHP code be structured to handle user input from form fields and translate it into SQL syntax for database updates?

To handle user input from form fields and translate it into SQL syntax for database updates, you can use PHP to sanitize and validate the input before constructing the SQL query. This helps prevent SQL injection attacks and ensures that the data being inserted into the database is safe and accurate. 

<?php
// Get user input from form fields
$userInput = $_POST['user_input'];

// Sanitize and validate user input
$sanitizedInput = filter_var($userInput, FILTER_SANITIZE_STRING);

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

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

// Construct SQL query
$sql = "INSERT INTO table_name (column_name) VALUES ('$sanitizedInput')";

// Execute SQL query
if ($conn->query($sql) === TRUE) {
    echo "Record inserted successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// Close database connection
$conn->close();
?>

Keywords

PHP user input form fields SQL syntax database updates

Related Questions