How can PHP developers effectively debug issues related to form submission and database interactions?

Issue: PHP developers can effectively debug issues related to form submission and database interactions by utilizing error reporting, checking for form submission, validating form data, and using proper SQL queries to interact with the database. 

<?php
// Enable error reporting to catch any syntax or runtime errors
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Check if the form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form data
    $name = $_POST['name'];
    $email = $_POST['email'];
    
    // Connect to the database
    $conn = new mysqli("localhost", "username", "password", "database");
    
    // Check for database connection errors
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }
    
    // Prepare and execute SQL query
    $sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";
    if ($conn->query($sql) === TRUE) {
        echo "New record created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
    
    // Close database connection
    $conn->close();
}
?>

Keywords

Xdebug var_dump error_reporting PDO SQL injection

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