How can PHP developers troubleshoot issues with form submissions and database interactions?

Issue: PHP developers can troubleshoot issues with form submissions and database interactions by checking for errors in the form data, validating input, and ensuring proper connection and query execution with the database. 

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form data
    $name = $_POST['name'];
    $email = $_POST['email'];

    if (empty($name) || empty($email)) {
        echo "Please fill out all fields";
    } else {
        // Connect to database
        $conn = new mysqli($servername, $username, $password, $dbname);

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

        // Insert data into database
        $sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";

        if ($conn->query($sql) === TRUE) {
            echo "New record created successfully";
        } else {
            echo "Error: " . $sql . "<br>" . $conn->error;
        }

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

Keywords

PHP form submissions database interactions troubleshooting error handling

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