What are some best practices for debugging PHP code that involves form submissions and database inserts?

Issue: When debugging PHP code that involves form submissions and database inserts, it is important to check for errors in the form data being submitted and the database connection. One common practice is to use PHP functions like var_dump() or print_r() to print out the form data and SQL queries to ensure they are correct. Additionally, checking for any error messages or exceptions thrown by the database connection can help pinpoint the issue. 

// Example PHP code snippet for debugging form submissions and database inserts

// Check form submission
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Print out form data
    var_dump($_POST);

    // Validate form data
    // Insert data into database
    // Check for errors
    if ($error) {
        echo "Error: " . $error;
    } else {
        echo "Data inserted successfully!";
    }
}

// Check database connection
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} else {
    echo "Database connected successfully!";
}

Keywords

Xdebug SQL injection PDO error handling form validation

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